LED luminaire

[0001] This application is a continuation-in-part of application Ser. No. 12/406,602, filed Mar. 18, 2009 and entitled “LED Luminaire,” which is incorporated herein by reference in its entirety.

[0002] 1. Technical Field

[0003] This invention pertains generally to a luminaire, and more specifically to a LED luminaire.

[0004] 2. Description of Related Art

[0005] Cobra head luminaires often include a single metal halide, high pressure sodium, or other high intensity discharge lamp enclosed within a cobra head luminaire housing. The cobra head luminaire housing may be mounted to a support structure such as a pole and used to illuminate an area such as a roadway or parking lot. The high intensity discharge lamps are connected to a power source and may have a life span in the neighborhood of approximately 24,000 hours. The high intensity discharge lamps may require five minutes or more to ramp up to full output following a power outage. Many cobra head luminaires utilizing a high intensity discharge lamp, such as those classified as having an IES Type III long distribution, may be classified as a semi-cutoff luminaire.

[0006] Generally, in one aspect a cobra head LED luminaire comprises a cobra head housing having a top housing portion and a lens frame assembly having a lens frame supporting a lens. The lens frame generally defines a first plane when the lens frame assembly is in an installed position. The cobra head LED luminaire further comprises a LED support structure maintained within the cobra head housing and coupled to the cobra head housing. Optionally, the LED support structure may be a LED support plate that has a retrofit support plate rim for integrating with the lens frame assembly of the cobra head housing. A first arcuate bracket extends outwardly from the LED support structure and a second arcuate bracket extends outwardly from the LED support structure. The cobra head LED luminaire further comprises at least one LED board with optical lenses extending between the first bracket and the second bracket. The LED board with optical lenses has a plurality of LEDs paired with an optical lens thereon. At least one LED board without optical lenses extends between the first bracket and the second bracket. The LED board without optical lenses has a plurality of LEDs not paired with an optical lens thereon. The first arcuate bracket and the second arcuate bracket allow the at least one LED board with optical lenses and the at least one LED board without optical lenses to be fixedly attached in an upward orientation or a downward orientation. In the upward orientation the first arcuate bracket and the second arcuate bracket extend upwardly from the LED support structure toward the top housing portion and the at least one LED board with optical lenses and the at least one LED board without optical lenses are inwardly oriented to provide cross light output. In the downward orientation the first arcuate bracket and the second arcuate bracket extend downwardly from the LED support structure away from the top housing portion and the at least one LED board with optical lenses and the at least one LED board without optical lenses are outwardly oriented to provide divergent light output.

[0007] In embodiments the lens may be, for example, a sag lens or a flat lens.

[0008] In some embodiments a plurality of the optical lens have a full distribution angle of between forty degrees and sixty degrees. In versions of these embodiments central light output axes of the LEDs paired with an optical lens are at a forty to sixty degree angle with respect to central light output axes of the LEDs not paired with an optical lens. In versions of these embodiments central light output axes of the LEDs paired with an optical lens and central light output axes of the LEDs not paired with an optical lens are aimed at a forward tilt angle of five to fifteen degrees with respect to the first plane. In versions of these embodiments a central axis of the at least one LED board with optical pieces is not coplanar with a central axis of the at least one LED board without optical pieces.

[0009] Generally, in another aspect, a LED luminaire comprises a housing having a top housing portion and a lens frame assembly having an adjustable lens frame supporting a lens. The lens frame assembly is adjustable between an open position and a closed position. The lens frame generally defines a first plane when the lens frame assembly is in the closed position. A LED support plate is coupled to the housing and has an opening therethrough. An LED support plate rim is provided along a periphery of the LED support plate, and the LED support plate has a downward facing surface facing downward and away from the top housing portion. The periphery of the LED support plate generally corresponds to the periphery of the lens. At least two brackets are coupled to the LED support plate and extending away from the LED support plate in spaced relation to one another. A plurality of downwardly aimed interior LEDs and a plurality of downwardly aimed exterior LEDs are mounted between the brackets in a generally arcuate arrangement. Each of the interior LEDs and the exterior LEDs have a central LED light output axis. Heat dissipating structure is in thermal connectivity with the interior LEDs and the exterior LEDs. A plurality of non-bending optical pieces are in cooperation with at least some of the exterior LEDs and have a full distribution angle of forty degrees to sixty degrees. The LED light output axis of the interior LEDs is at a sideways tilt angle of between seventy three and eighty seven degrees with respect to the first plane. The LED light output axis of the exterior LEDs is at a sideways tilt angle of between eighteen degrees and thirty three degrees with respect to the first plane. The LED light output axis of the interior LEDs and the LED light output axis of the exterior LEDs are at a forward tilt angle of between eighty-seven degrees and seventy-three degrees with respect to the first plane.

[0010] In some embodiments the brackets extend upwardly from the LED support plate toward the top housing portion and wherein each of the interior LEDs and the exterior LEDs is adjusted inwardly.

[0011] In some embodiments the brackets extend downwardly from the LED support plate toward the top housing portion and wherein each of the interior LEDs and the exterior LEDs is adjusted outwardly.

[0012] In some embodiments an exterior LED board supports a plurality of the exterior LEDs. In some embodiments the LED luminaire further comprises a gasket compressed between the LED support plate and the lens frame assembly when the lens frame assembly is in the closed position. In versions of these embodiments the LED support plate, the heat dissipating structure, and the lens cooperate to form a substantially sealed optical chamber.

[0013] Generally, in another aspect, a housing has a top housing portion and a hingedly adjustable lens frame assembly. The lens frame assembly has a lens frame supporting a lens. An LED structure is provided within the housing. The LED structure includes a LED support plate coupled to the housing. The LED support plate defines a first plane and has a downward facing surface facing downward and away from the top housing portion. The lens frame and the lens are hingeable with respect to the plate between an open position and a closed position. The LED structure further includes a gasket compressed between the plate and the lens frame assembly when the lens frame assembly is in the closed position. The gasket generally defines a first plane. The LED structure further includes two brackets coupled to the plate and extending away from the plate and the top housing portion in spaced relation to one another. The LED structure further includes two interior LED boards and two exterior LED boards. The interior LED boards and the exterior LED boards are mounted between the brackets in an arcuate relationship with respect to the first plane. Each of the interior LED boards and the exterior LED boards have a first end and a second end opposite the first end, an axis extending from the first end to the second end, a front surface extending from the first end to the second end, a rear surface opposite the front surface, and a plurality of light emitting diodes on the front surface. The LED structure further includes two exterior heatsinks, each of the exterior heatsinks is in thermal connectivity with a single of the exterior LED boards. The LED structure further includes two interior heatsinks, each of the interior heatsinks is in thermal connectivity with a single of the interior LED boards. The LED structure further includes a plurality of optical pieces on each of the exterior boards, each of the optical pieces is paired with a single of the light emitting diodes. Each interior LED board is adjusted about its respective axis between five degrees and fifteen degrees with respect to the first plane. Each exterior LED board is adjusted about its respective the axis between sixty and seventy degrees with respect to the first plane. Each axis of the interior LED boards and the exterior LED boards are at a forward tilt angle of between five degrees and fifteen degrees with respect to the first plane. Each of the optical pieces has a full distribution angle of between forty degrees and sixty degrees.

[0014] In some embodiments the LED luminaire produces an IES cutoff type III distribution.

[0015] In some embodiments each of the optical pieces is non-bending and includes a collimator lens.

[0016] In some embodiments the LED support plate contains an opening therethrough. In versions of these embodiments each of the interior heatsinks extends rearward from the rear surface of a corresponding of the interior LED boards toward the opening and wherein each of the exterior heat sinks extends rearward from the rear surface of a corresponding of the exterior LED boards toward the opening. In versions of these embodiments each of the interior heatsinks is coupled to one of the exterior heatsinks. In versions of these embodiments each of the exterior heatsinks is coupled to a protrusion extending downwardly from the LED support plate. In versions of these embodiments the LED support plate is coupled to the lens frame assembly.

[0039] It is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of “including,” “comprising,” or “having” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless limited otherwise, the terms “connected,” “coupled,” “in communication with” and “mounted,” and variations thereof herein are used broadly and encompass direct and indirect connections, couplings, and mountings. In addition, the terms “connected” and “coupled” and variations thereof are not restricted to physical or mechanical connections or couplings.

[0040] Furthermore, and as described in subsequent paragraphs, the specific mechanical configurations illustrated in the drawings are intended to exemplify embodiments of the invention and that other alternative mechanical configurations are possible.

[0041] Referring now to the figures, wherein like reference numerals refer to like parts, and initially referring to FIG. 1 through FIG. 4, a first embodiment of a LED luminaire 100 is depicted. LED Luminaire 100 has a housing having an upper housing portion 110 and a lower housing portion 112 that surround an LED structure 120. In some embodiments the housing is a Cobra Head RW601S/F Casting manufactured by Grandlite. Light emitted by LED structure 120 exits the housing through a light exit aperture 118, which in the depicted embodiment is formed in lower housing portion 112. Light exit aperture 118 defines a plane through which light exits LED luminaire 100. In some embodiments a lens 119 may be provided to fully enclose the housing and/or to alter optical characteristics of light exiting LED luminaire 100. In the depicted embodiment lens 119 lies substantially in the plane defined by light exit aperture 118. In other embodiments lens 119 may be at an angle with respect to light exit aperture 118 and not lie in the plane defined by light exit aperture 118. In yet other embodiments lens 119 may be concave, convex, or otherwise non-planar and not lie entirely in the same plane as light exit aperture 118. LED luminaire 100 is adapted to be secured to a pole or other mounting surface. Hinge element 114 is provided on upper housing portion 110 and hinge element 116 is provided on lower housing portion 112. Hinge elements 114 and 116 interact to enable hinged movement of upper and/or lower housing portions 110 and 112 to gain access to components of LED luminaire 100.

[0042] With particular reference to FIG. 2, LED structure 120 has three LED strips, each having an LED board 130 in thermal connectivity with a heatsink 134. In the depicted embodiment of LED luminaire 100 heatsink 134 is an extruded aluminum heatsink manufactured by Aavid Thermalloy and is part number 61215 in their catalog. The heatsink has been cut to a length of approximately 7.875″ and appropriate apertures have been drilled therein for attaching LED boards 130 to heatsink 134 and for attaching heatsink 134 to a first portion 144 of a master frame and a second portion 142 of the master frame, as described in more detail herein. In other embodiments alternative heatsink configurations may be used or heatsinks 134 may be omitted altogether if not desired for heat dissipation.

[0043] Each LED board 130 has eight LEDs 131 and corresponding optical pieces 132 paired with each LED 131. In FIG. 2 LEDs 131 are shown in phantom on the LED board 130 that is exploded away. The term “LED” as used herein is meant to be interpreted broadly and can include, but is not limited to, an LED of any color, any luminosity, and any light distribution pattern, and also includes, but is not limited to, an organic light emitting diode (OLED). In the depicted embodiment LEDs 131 are Luxeon Rebels part number LXML-PWN1-0080 having a Kelvin Color Temperature of approximately 4100K. Each LED is driven by a power supply at approximately 500 mA of current. In the depicted embodiment LED board 130 is a Thermalume metal core printed circuit board manufactured by Midwest Circuits and measures approximately 7.875″ by 1.63″. Although eight LEDs 131 and eight optical pieces 132 in a particular arrangement on LED board 130 are depicted, in other embodiments the number, arrangement, and/or configuration of LEDs 131 and/or optical pieces 132 on each LED board 130 may vary. Also, in other embodiments some or all of LEDs 131 on LED board 130 may be provided without a corresponding optical piece 132.

[0044] Each optical piece 132 may be individually configured to produce a given beam distribution when paired with a given LED 131 on a given LED board 130. In some embodiments each optical piece 132 and its corresponding LED 131 may be individually configured based on their orientation and positioning within LED luminaire 100. For example, in some embodiments some LEDs 131 and their corresponding optical piece 132 will be configured to produce a narrower beam spread, such as, for example, a twenty degree beam spread. For example, other LEDs 131 and optical pieces 132 will be configured to produce a wider beam spread, such as, for example, a one-hundred-and-twenty degree beam spread. Any LED 131 and optical piece 132 may be configured for conical beam distribution, non-conical beam distribution, symmetric beam distribution, and/or asymmetric beam distribution.

[0045] Any number of beam distributions and configurations may be present in LED luminaire 100. For example, in some embodiments each optical piece 132 and its corresponding LED 131 in LED structure 120 produce a beam distribution that is unique from the beam distribution of any other optical piece 132 and its corresponding LED 131. For example, in other embodiments all optical pieces 132 and their corresponding LED 131 in LED structure 120 produce the same beam distribution. For example, in yet other embodiments some optical pieces 132 in LED structure 120 share a first common configuration and other optical pieces 132 in LED structure 120 share a second common configuration. For example, in yet other embodiments some optical pieces 132 in LED structure 120 share a first common configuration, other optical pieces 132 in LED structure 120 share a second common configuration, other optical pieces 132 in LED structure 120 share a third common configuration, and a single optical piece 132 in LED structure 120 has a unique fourth configuration.

[0046] For example, in some embodiment the four LED optical pieces 132 on each LED board 130 that are closest a first end 135 of LED board 130 proximal to first portion 144 of the master frame are six degree LED collimator lenses. In some embodiments the six degree optical pieces are manufactured by Polymer Optics and are part number 120 in their catalog. It should be noted that “six degrees” refers to the half angle of the collimator lenses and not the full angle. In some embodiments the four LED optical pieces 132 on each LED board 130 that are closest to a second end 137 of LED board 130 proximal to second portion 142 of the master frame are twenty five degree LED collimator lenses. In some embodiments the twenty five degree optical pieces are Manufactured by Polymer Optics and are part number 124 in their catalog. It should be noted that “twenty five degrees” refers to the half angle of the collimator lenses and not the full angle. Other configurations of optical pieces 132 and/or LEDs 131 may be utilized to obtain desired optical output by LED luminaire 100.

[0047] Each LED board 130 and heatsink 134 is coupled between first portion 144 of a master frame and second portion 142 of the master frame. Apertures 146 are provided through first portion 144 for securing each heatsink 134 to first portion 144 with fasteners. In other embodiments LED board 130 and/or heatsink 134 may be welded or otherwise coupled to first portion 144. Similar couplings can be used between heatsink 134 and second portion 142. First portion 144 and second portion 142 are provided with securing apertures 145 and 147, respectively, for coupling first portion 144 and second portion 142 to upper housing 110 at supports 111 and 113 respectively. In other embodiments first portion 144 and/or second portion 142 may be otherwise secured to upper housing 110 and/or lower housing 112. An axis A, shown extending from the LED board 130 that is exploded away, extends through the center of each LED board 130 from first end 135 of LED board 130 proximal to first portion 144 to second end 137 of LED board 130 proximal to second portion 142.

[0048] With particular reference to FIG. 2 and FIG. 3, it can be seen that each LED board 130 is adjusted about its respective axis to an orientation that is unique from the orientation of other LED boards 130. The outside LED boards 130 are adjusted about their respective axes to an orientation that is approximately sixty degrees off from the orientation of the center LED board 130. Moreover, the outside LED boards 130 are adjusted approximately sixty degrees in opposite directions about their respective axes to orientations that are unique from one another. With particular reference to FIG. 2 it can be seen that the axes corresponding to each LED board 130 are at non-parallel angles with respect to one another. The axes of the two outside LED boards 130 are each at approximately a ten degree angle with respect to the axis of the center LED board 130 and the axes of the two outside LED boards 130 are at approximately a twenty degree angle with respect to one another. With particular reference to FIG. 4, it can further be seen that the axes of LED boards 130 are at approximately a twenty degree angle with respect to the plane defined by light exit aperture 118. The axes of LED boards 130 all lie in substantially the same plane due to all LED boards 130 being at a common angle with respect to light exit aperture 118 and all LED boards 130 being a common distance away from light exit aperture 118. Although approximate positionings of each LED board 130 have been described, other positionings may be used to obtain desired optical output from LED luminaire 100. Moreover, a variety of combinations of LEDs 131 and/or optical pieces 132 can be used to obtain desired beam distributions and desired optical output from LED luminaire 100.

[0049] With reference to FIG. 5 through FIG. 8, a second embodiment of a LED luminaire 200 is depicted. LED Luminaire 200 has a housing having a rear housing portion 210 and a front housing portion 212 that surround an LED structure 220. In some embodiments the housing is a WPC15 casting manufactured by QSSI. Light emitted by LED structure 220 exits the housing portion through light exit aperture 218, which in the depicted embodiment is formed in front housing portion 212. Light exit aperture 218 defines a plane through which light exits LED luminaire 200. In some embodiments a lens 219 may be provided to fully enclose the housing and/or to alter optical characteristics of light exiting LED luminaire 200. LED luminaire 200 is adapted to be secured to a junction box, wall, or other mounting surface. Front housing portion 212 is designed to removably engage rear housing portion 210. A wire throughway 215 allows electrical wiring into LED luminaire 200 to provide power to LED structure 220. In some embodiments electrical wiring entering LED luminaire 200 may directly feed LED structure 220. In some embodiments electrical wiring entering LED luminaire 200 may feed a sixty watt power supply within LED luminaire 200, which then feeds LED structure 220. In some embodiments the sixty watt power supply may be manufactured by Heyboer Transformers, part number HTS-9162. For simplification no power supply is shown in LED luminaire 200 or any other embodiments, but it is understood that power supplies may be easily included in, or remote to, any housings of the described embodiments.

[0050] With particular reference to FIG. 6, LED structure 220 has five LED strips, each having an LED board 230 in thermal connectivity with a heatsink 234. In the depicted embodiment of LED luminaire 100 heatsink 134 is an extruded aluminum heatsink manufactured by Aavid Thermalloy and is part number 61215 in their catalog. The heatsink has been cut to a length of 5.75″ and appropriate apertures have been drilled therein for attaching LED boards 230 to heatsink 234 and for attaching heatsink 234 to a first portion 244 of a master frame and a second portion 242 of the master frame, as described in more detail herein. In other embodiments alternative heatsink configurations may be used, or heatsinks 234 may be omitted altogether if not desired for heat dissipation.

[0051] Each LED board 230 has four LEDs 231 and four of the LED boards 230 have corresponding optical pieces 232 paired with each LED 231. In the depicted embodiment LEDs 131 are Luxeon Rebels part number LXML-PWN1-0080 having a Kelvin Color Temperature of approximately 4100K. Each LED is driven by a power supply at approximately 500 mA of current. In the depicted embodiment LED board 130 is a Thermalume metal core printed circuit board manufactured by Midwest Circuits and measures approximately 5.75″ by 1.63″. The middle LED board 230 does not have optical pieces 232 paired with its LEDs 231. Although four LEDs 231 in a particular arrangement on LED board 230 are depicted, in other embodiments the number, arrangement, and/or configuration of LEDs 231 and/or LED boards 230 may vary. Also, in other embodiments some or all of LEDs 231 on LED boards 230, beside the LEDs 231 on center LED board 230, may be provided without a corresponding optical piece 232.

[0052] As described with the first embodiment, each optical piece 232 on an LED board 230 may be individually configured to produce a given beam distribution when paired with a given LED 231. Also, each LED 231 not paired with an optical piece 232 may be individually configured to produce a desired beam distribution. Each optical piece 232 and LED 231 may be individually configured based on their orientation and positioning within LED luminaire 200. For example, in some embodiments all four LED optical pieces 232 on the two outermost LED boards 230 are six degree LED collimator lenses. In some embodiments the six degree optical pieces are Manufactured by Polymer Optics and are part number 220 in their catalog. Again, “six degrees” refers to the half angle of the collimator lenses and not the full angle. In some embodiments all four LED optical pieces 232 on the two LED boards 230 immediately adjacent the center LED board 230 are twenty five degree LED collimator lenses. In some embodiments the twenty five degree optical pieces are Manufactured by Polymer Optics and are part number 224 in their catalog. Again, “twenty five degrees” refers to the half angle of the collimator lenses and not the full angle. Other configurations of optical pieces 232 and/or LEDs 231 are contemplated and may be utilized to obtain desired optical output by LED luminaire 200.

[0053] Each LED board 230 and heatsink 234 is coupled between a first portion 244 of a master frame and a second portion 242 of the master frame. First portion 244 and second portion 242 are provided with securing apertures 245 and 247, respectively, for coupling first portion 244 and second portion 242 to front housing 212. Fasteners, such as screws 6 can extend through securing apertures 245 and/or 247 for coupling first portion 244 and/or second portion 242 to front housing 212. In other embodiments first portion 244 and/or second portion 242 may be otherwise secured to front housing 212 and/or rear housing 210. Screws 5 extend through apertures in second portion 242 and secure each heatsink 234 to second portion 242 with fasteners. In other embodiments LED board 230 and/or heatsink 234 may be welded or otherwise coupled to second portion 242. Also, in other embodiments LED boards 230 and/or heatsinks 234 may be directly coupled to front housing 212 and/or rear housing 210 or otherwise coupled to LED luminaire 200. Similar couplings can be used between heatsink 234 and first portion 244. An axis extends through the center of each LED board 230 extending from a first end 235 of LED board 230 proximal to first portion 244 to a second end 237 of LED board 230 proximal to second portion 242.

[0054] With particular reference to FIG. 6 and FIG. 7, it can be seen that the middle LED board 230 is adjusted about its axis to a first orientation, two of the LED boards 230 on a first side of the middle LED board 230 are adjusted about their axes to a second orientation, and two of the LED boards 230 on a second side of the middle LED board 230 are adjusted about their axes to a third orientation. The LED boards 230 on a first side of the middle LED board 230 are adjusted about their axes to an orientation that is approximately sixty-five degrees off in a first direction from the orientation of the center LED board 230. The LED boards 230 on a second side of the center LED board 230 are adjusted about their axes to an orientation that is approximately sixty-five degrees off in a second direction from the orientation of the center LED board 230. In some embodiments the orientation of a given LED board 230 about its own axis can be fixedly adjusted per customer's specifications to achieve a desired optical output. With particular reference to FIG. 6, it can be seen that the axes corresponding to LED boards 230 are substantially parallel with respect to one another. With particular reference to FIG. 8, it can further be seen that the axes of LED boards 230 are at approximately a twenty degree angle with respect to the plane defined by light exit aperture 218. However, the axes of LED boards 230 do not all lie in the same plane. Although all LED boards 230 are at substantially the same angle with respect to light exit aperture 218, the axes of the two exterior LED boards 230 are positioned closer to light exit aperture 218 than the axes of the other three LED boards 230. Although approximate positionings of each LED board 230 have been described, other positionings may be used to obtain desired optical output from LED luminaire 200.

[0055] In other embodiments of LED luminaire 200 the two LED boards 230 immediately adjacent the center LED board may be omitted from LED luminaire 200. In yet other embodiments of LED luminaire 200 the middle LED board 230 may be provided with twenty five degree LED collimator lens optical pieces 232 paired with the two LEDs 231 that are closest to second portion 242 of the master frame. In yet other embodiments the two LED boards 230 immediately adjacent the center LED board 230 may be adjusted about their axes to an orientation that is approximately forty-five degrees off from the orientation of the center LED board 230 and the two outermost LED boards 230 may be adjusted about their axes to an orientation that is approximately sixty-five degrees off from the orientation of the center LED board 230.

[0056] With reference to FIG. 9 through FIG. 11, a third embodiment of a LED luminaire 300 is depicted. LED Luminaire 300 has a housing having an upper housing portion 310 and a lower housing portion 312 that surround an LED structure 320. In some embodiments the housing is a FL70 casting manufactured by QSSI. Light emitted by LED structure 320 exits the housing portion through light exit aperture 318, which in the depicted embodiment is formed in lower housing portion 312. Light exit aperture 318 defines a plane through which light exits LED luminaire 300. In some embodiments a lens 319 may be provided to fully enclose the housing and/or to alter optical characteristics of light exiting LED luminaire 300. LED luminaire 300 is adapted to be secured to a junction box, ceiling, or other mounting surface. Lower housing portion 312 is designed to removably engage upper housing portion 310. A wire throughway 315 extends through upper housing portion 310 and allows electrical wiring into LED luminaire 300 to provide power to LED structure 320. In some embodiments electrical wiring entering LED luminaire 300 may directly feed LED structure 320. In some embodiments electrical wiring entering LED luminaire 300 may feed a sixty watt power supply within LED luminaire 200, which then feeds LED structure 220. In some embodiments the sixty watt power supply may be manufactured by Heyboer Transformers, part number HTS-9162. For simplification no power supply is shown in LED luminaire 300 or any other embodiments, but it is understood that power supplies may be easily included in any housings of the described embodiments.

[0057] With particular reference to FIG. 9 and FIG. 10, LED structure 320 has five LED strips, each having an LED board 330 in thermal connectivity with a heatsink 334. In the depicted embodiment of LED luminaire 300 heatsink 334 is an extruded aluminum heatsink manufactured by Aavid Thermalloy and is part number 61215 in their catalog. The heatsink has been cut to a length of 5.75″ and appropriate apertures have been drilled therein for attaching LED boards 330 to heatsink 334 and for attaching heatsink 334 to a first portion 344 of a master frame and a second portion 342 of the master frame, as described in more detail herein. In other embodiments alternative heatsink configurations may be used, or heatsinks may be omitted altogether if not desired for heat dissipation. Each LED board 330 has four LEDs 331 and corresponding optical pieces 332 paired with each LED 331. Although four LEDs 331 in a particular arrangement on LED board 330 are depicted, in other embodiments the number, configuration, and/or arrangement of LEDs 331 and/or LED board 330 may vary. Also, in other embodiments some or all of LEDs 331 on LED boards 330 may be provided without a corresponding optical piece 332.

[0058] As described with the first and second embodiments, each optical piece 332 on an LED board 330 may be individually configured to produce a given beam distribution when coupled with a given LED 331. Each optical piece 332 and LED 331 may be individually configured based on its orientation and positioning within LED luminaire 300. For example, in some embodiments all four LED optical pieces 232 on the two outermost LED boards 330 are six degree LED collimator lenses. In some embodiments the six degree optical pieces are Manufactured by Polymer Optics and are part number 320 in their catalog. Again, “six degrees” refers to the half angle of the collimator lenses and not the full angle. In some embodiments all four LED optical pieces 332 on the two LED boards 330 immediately adjacent the center LED board 330 are twenty five degree LED collimator lenses. In some embodiments the twenty five degree optical pieces are Manufactured by Polymer Optics and are part number 324 in their catalog. Again, “twenty five degrees” refers to the half angle of the collimator lenses and not the full angle. In some embodiment the LED optical pieces 332 on the center LED board 330 are twenty five degree LED collimator lenses. Other configurations of optical pieces 332 and/or LEDs 331 are contemplated and may be utilized to obtain desired optical output by LED luminaire 300.

[0059] Each LED board 330 and heatsink 334 is coupled between a first portion 344 of a master frame and a second portion 342 of the master frame. Screws 5 extend through apertures in second portion 342 and secure each heatsink 334 to second portion 342. In other embodiments LED board 330 and/or heatsink 334 may be welded or otherwise coupled to second portion 342. Similar couplings can be used between heatsink 334 and first portion 344. Second portion 342 is fastened to lower housing 312 by fasteners 7 and first portion 344 is also fastened to lower housing 312 by fasteners 7. In other embodiments first portion 344 and/or second portion 342 may be otherwise secured to upper housing 310 and/or lower housing 312. An axis extends through the center of each LED board 330 from a first end 335 of LED board 330 proximal to first portion 344 to a second end 337 of LED board 330 proximal to second portion 342.

[0060] With particular reference to FIG. 10, it can be seen that the middle LED board 330 is adjusted about its axis to a first orientation, two of the LED boards 330 on a first side of the center LED board 330 are adjusted about their axes to a second orientation, and two of the LED boards 330 on a second side of the middle LED board 330 are adjusted about their axes to a third orientation. The LED boards 330 on a first side of the middle LED board 330 are adjusted about their axes to an orientation that is approximately sixty degrees off in a first direction from the orientation of the center LED board 330. The LED boards 330 on a second side of the middle LED board 330 are adjusted about their axes to an orientation that is approximately sixty degrees off in a second direction from the orientation of the center LED board 330. With particular reference to FIG. 9 it can be seen that the axes corresponding to LED boards 330 are substantially parallel with respect to one another.

[0061] With particular reference to FIG. 11, it can further be seen that the axes of LED boards 330 are at approximately a twenty-five degree angle with respect to the plane defined by light exit aperture 318. In other embodiments the axes of the LED boards 330 may be at a variety of angles with respect to the plane defined by light exit aperture 318. For example, in some embodiments the axes of two LED boards may be at twenty degree angles, the axes of two LED boards may be at ten degree angles, and the axis of one LED board may be parallel to the plane defined by light exit aperture 318. The axes of LED boards 330 do not all lie in the same plane. Although the axes of all LED boards 330 are at substantially the same angle with respect to light exit aperture 318, the axes of the two exterior LED boards 330 are positioned closer to light exit aperture 318 than the axes of other three LED boards 330. Although approximate positionings of each LED board 330 have been described, other positionings may be used to obtain desired optical output from LED luminaire 300. In other embodiments the two LED boards 330 immediately adjacent the center LED board 330 may be adjusted about their axes to an orientation that is approximately forty-five degrees off from the orientation of the center LED board 330 and the two outermost LED boards 330 may be adjusted about their axes to an orientation that is approximately sixty degrees off from the orientation of the center LED board 330.

[0062] With reference to FIG. 12 and FIG. 13, a fourth embodiment of a LED luminaire 400 is depicted. LED Luminaire 400 has a housing having an upper housing portion 410 and a lower housing portion 412 that surround an LED structure 420. Light emitted by LED structure 420 exits the housing portion through a lens 419, which in the depicted embodiment is formed in lower housing portion 412. Light exit aperture 418 defines a plane through which light exits LED luminaire 400 and is at the base of lens 419 in this embodiment. Light will exit LED luminaire 400 through other portions of lens 419 as well, but light exit aperture 418 still defines a plane through which light exits LED luminaire 400. In the embodiment of FIG. 12, a majority of light will exit the plane defined by light exit aperture 418. LED luminaire 400 is adapted to be secured to a junction box, ceiling, or other mounting surface. Lower housing portion 412 is designed to removably engage upper housing portion 410. For simplification no power supply is shown in LED luminaire 400 or any other embodiments, but it is understood that power supplies may be easily included in any housings of the described embodiments.

[0063] With particular reference to FIG. 13, LED structure 420 has four LED strips, each having an LED board 430 in thermal connectivity with a heatsink 434. In other embodiments alternative heatsink configurations may be used, or heatsinks may be omitted altogether if not desired for heat dissipation. Each LED board 430 has four LEDs 431 and corresponding optical pieces 432 paired with each LED 431. Although four LEDs 431 in a particular arrangement on LED board 430 are depicted, in other embodiments, the number and/or arrangement of LEDs 431 on each LED board 430 may vary. Also, in other embodiments some or all of LEDs 431 on LED boards 430 may be provided without a corresponding optical piece 432.

[0064] As described with the first, second, and third embodiments, each optical piece 432 on an LED board 430 may be individually configured to produce a given beam distribution when coupled with a given LED 431. Each optical piece 432 and LED 431 may be individually configured based on their orientation and positioning within LED luminaire 400. Each LED board 430 and heatsink 434 is coupled between two corner frame portions 441 by fasteners 5. Corner frame portions 441 are coupled to upper housing 410. In other embodiments LED board 430 and/or heatsink 434 may be otherwise secured to upper housing 410 and/or lower housing 412. An axis extends through the center of each LED board 430 extending from a first end 435 of LED board 430 to a second end 437 of LED board 430.

[0065] The axes of LED boards 430 in the embodiment of FIG. 12 and FIG. 13 are approximately parallel with respect to the plane defined by light exit aperture 418. Also, the axes corresponding to each LED board 430 are at substantially perpendicular angles with respect to one another. Each LED board 430 is adjusted about its axis approximately sixty degrees with respect to the plane defined by light exit aperture 418. Each LED board 430 is adjusted about its axis to a unique orientation. Although approximate positionings of each LED board 430 have been described, other positionings may be used to obtain desired optical output from LED luminaire 400.

[0066] With reference to FIG. 14 through FIG. 16, a fifth embodiment of a LED luminaire 500 is depicted. LED Luminaire 500 has a housing having a rear housing portion 510 and a front housing portion 512 that surround an LED structure 520. In the depicted embodiment the housing is a WPC15 model number housing manufactured by QSSI. Light emitted by LED structure 520 exits the housing portion through light exit aperture 518, which in the depicted embodiment is formed in front housing portion 512. Light exit aperture 518 defines a plane through which light exits LED luminaire 500. In some embodiments a lens 519 may be provided to fully enclose the housing and/or to alter optical characteristics of light exiting LED luminaire 500. LED luminaire 500 is adapted to be secured to a junction box, wall, or other mounting surface. Lower housing portion 512 is designed to removably engage upper housing portion 510. In some embodiments electrical wiring entering LED luminaire 500 may directly feed LED structure 520. In some embodiments electrical wiring entering LED luminaire 500 may feed a sixty watt power supply within LED luminaire 500, which then feeds LED structure 520. In some embodiments the sixty watt power supply may be manufactured by Heyboer Transformers, part number HTS-9162. For simplification no power supply is shown in LED luminaire 500 or any other embodiments, but it is understood that power supplies may be easily included in any housings of the described embodiments.

[0067] LED structure 520 has four LED strips, each having an LED board 530 in thermal connectivity with a heatsink 534. In the depicted embodiment of LED luminaire 500 heatsink 534 is an extruded aluminum heatsink manufactured by Aavid Thermalloy and is part number 61215 in their catalog. The heatsink has been cut to a length of 5.75″ and appropriate apertures have been drilled therein for attaching LED boards 530 to heatsink 534 and for attaching heatsink 534 to a first portion 544 of a master frame and a second portion 542 of the master frame, as described in more detail herein. In other embodiments alternative heatsink configurations may be used, or heatsinks may be omitted altogether if not desired for heat dissipation.

[0068] Each LED board 530 has four LEDs 531 and corresponding optical pieces 532 paired with each LED 531. In the depicted embodiment LEDs 531 are Luxeon Rebels part number LXML-PWN1-0080 having a Kelvin Color Temperature of approximately 4100K. Each LED is driven by a power supply at approximately 500 mA of current. In the depicted embodiment LED board 530 is a Thermalume metal core printed circuit board manufactured by Midwest Circuits and measures approximately 5.75″ by 1.63″. The LED board 530 positioned farthest away from light exit aperture 518 does not have optical pieces 532 paired with its LEDs 531. Although four LEDs 531 in a particular arrangement on LED boards 530 are depicted, in other embodiments the number, configuration and/or arrangement of LEDs 531 and/or LED boards 530 may vary.

[0069] As described with the first, second, third, and fourth embodiments, each optical piece 532 on an LED board 530 may be individually configured to produce a given beam distribution when coupled with a given LED 531. Each optical piece 532 and LED 531 may be individually configured depending on its orientation and positioning within LED luminaire 500. For example, in some embodiments the LED board 530 positioned farthest away from light exit aperture 518 does not have optical pieces 532 paired with its LEDs 531. In some embodiments all four LED optical pieces 232 on the other three LED boards 530 are twenty-five degree LED collimator lenses. In some embodiments the twenty-five degree optical pieces are Manufactured by Polymer Optics and are part number 124 in their catalog. Again, “twenty-five degrees” refers to the half angle of the collimator lenses and not the full angle. Other configurations of optical pieces 532 and/or LEDs 531 are contemplated and may be utilized to obtain desired optical output by LED luminaire 500.

[0070] Each LED board 530 and heatsink 534 is coupled to either first portion 544 of a master frame or a second portion 542 of the master frame. Two LED boards 530 are coupled between a first extension 544a and a second extension 544b of first portion 544 of the master frame. Screws 5 may extend through apertures in second portion 542 and/or first portion 544 to secure each heatsink 534. In other embodiments LED board 530 and/or heatsink 534 may be welded or otherwise coupled to the master frame and/or the housing. Similar couplings can be used between heatsink 334 and first portion 344. Second portion 542 is fastened to front housing 512 and first portion 544 is also fastened to front housing 512. In other embodiments first portion 544 and/or second portion 542 may be otherwise secured to upper housing 510 and/or lower housing 512. An axis extends through the center of each LED board 530 from a first end 535 of LED board 530 proximal to first portion 544 to a second end 537 of LED board 530 proximal to second portion 542.

[0071] The LED board 530 positioned farthest away from light exit aperture 518 is adjusted about its axis such that LED board 530 is at approximately a forty degree angle with respect to the plane defined by light exit aperture 518. The axis of LED board 530 positioned farthest away from light exit aperture 518 is substantially parallel with light exit aperture 518. The LED board 530 positioned adjacent to the LED board 530 that is farthest away from light exit aperture 518 is adjusted about its axis such that the LED board 530 is at approximately a sixty degree angle with respect to the plane defined by light exit aperture 518. The axis of LED board 530 positioned adjacent to the LED board 530 that is farthest away from light exit aperture 518 is substantially parallel with light exit aperture 518. The remaining two LED boards 530 are adjusted about their axes such that LED board 530 is at approximately a forty-seven degree angle with respect to the plane defined by light exit aperture 518. The axes of the remaining two LED boards 530 are at an angle of approximately eleven degrees with respect to light exit aperture 518.

[0072] With reference to FIG. 17 through FIG. 20, a sixth embodiment of a LED luminaire 600 is depicted. A cobra head housing of LED Luminaire 600 is shown in phantom in FIG. 17. The cobra head housing has an upper housing portion 610 and a lens frame assembly 612 that surround an LED structure 620. The lens frame assembly 612 has a lens frame 613 supporting a sag lens 614. The lens frame assembly 612 is adjustable with respect to the upper housing portion 610 between an open or access position and a closed or installed position. The open or access position of the lens frame assembly 612 allows for access to the interior of the cobra head housing. In the installed position of the lens frame assembly 612 the lens frame 613 generally defines a plane. The cobra head housing may be affixed to a structure such as, for example, a support pole or a wall. In some embodiments the cobra head housing may be a Cobra Head Housing manufactured by General Electric. In alternative embodiments a cobra head housing may be provided with a lens frame that supports a non-sag lens such as, for example, a flat lens. Light emitted by the LED structure 620 exits the cobra head housing through the lens 614.

[0073] A wire throughway may be provided through the cobra head housing to allow electrical wiring into cobra head LED luminaire 600 to provide power to LED structure 620. In some embodiments electrical wiring entering LED luminaire 600 may directly feed LED structure 620. In some embodiments electrical wiring entering LED luminaire 600 may feed a power supply 607, shown in FIG. 17, mounted to a top support bracket 656 extending upwardly from the LED structure 620, which then feeds LED structure 620. In some embodiments the power supple 607 may be a sixty watt power supply that provides a 24 Volt 2.8 Amp output and be manufactured by Advance, part number LED-INTA-0024V-28-F-O.

[0074] With particular reference to FIG. 18 through FIG. 20, LED structure 620 has four LED strips, each having an LED board 630 in thermal connectivity with a heatsink 634. In the depicted embodiment of LED luminaire 600 heatsink 634 is an extruded aluminum heatsink manufactured by Aavid Thermalloy and is part number 61215 in their catalog. The heatsink has been cut to a length of 5.75″ and appropriate apertures have been drilled therein for attaching LED boards 630 to the heatsinks 634 and for attaching heatsinks 634 to an arcuate outwardly and downwardly extending front bracket 647 and an arcuate outwardly and downwardly extending rear bracket 642. The two exterior LED boards 630 have eight LEDs 631 and corresponding optical pieces 632 paired with each LED 631. As described with the previous embodiments, each optical piece 632 on an LED board 630 may be individually configured to produce a given beam distribution when coupled with a given LED 631. In some embodiments all eight LED optical pieces 632 on each of the two outermost LED boards 630 are twenty five degree LED collimator lenses. In some embodiments the twenty five degree optical pieces are Manufactured by Polymer Optics. Again, “twenty five degree” refers to the half angle of the collimator lenses and not the full angle. The two interior LED boards 630 have eight LEDs 631 that are not provided with a corresponding optical piece. In some embodiments the LEDs 631 are Luxeon Rebel LEDs being driven at approximately 500 mA and having approximately a one-hundred and twenty full angle optical output. LEDs 631 each have a central light output axis that is substantially perpendicular to a corresponding LED board 630 to which it is mounted.

[0075] Each LED board 630 and heatsink 634 is coupled between rear support bracket 642 and front support bracket 647. Screws 5 extend through apertures in rear support bracket 642 and front support bracket 647 and are received in corresponding apertures of each heat sink 634, thereby affixing each heatsink 634 and LED board 630 at a desired orientation. In other embodiments LED board 630 and/or heatsink 634 may be welded or otherwise coupled to front support bracket 647 and/or rear support bracket 642. Front support bracket 647 and rear support bracket 642 are coupled to LED support plate 650 and are downwardly and outwardly extending from the LED support plate 650. When installed in the cobra head housing, the LED support plate 650 lies in substantially the same plane defined by lens frame 613. The LED support plate 650 has a LED support plate rim 652 provided along a periphery thereof. In some embodiments the LED support plate rim 652 may include a polyethelene gasket 653 coupled thereto and extending downwardly therefrom. In the depicted embodiment the periphery of the LED support plate 650 generally corresponds to the shape of the periphery of the lens 614 and the gasket 653 may be compressed between the periphery of the lens 614 and the LED support plate rim 652 when LED support structure 620 is installed and lens frame assembly 612 is in the closed position.

[0076] The LED support plate 650 has an opening 651 therethrough. The heatsinks 634 extend rearward from the LED support boards 630 toward the opening 651 and may extend at least partially through the opening 651. A portion of the longitudinal edge of each of the interior heatsinks 634 is immediately adjacent a portion of the longitudinal edge of an adjacent exterior heatsink 634 and a portion of the other longitudinal edges of the interior heatsinks 634 are immediately adjacent one another. A pair of side protrusions 654 are coupled to and extend away from the support plate 650 and each have an edge that is provided immediately adjacent a portion of the other longitudinal edges of the exterior heatsinks 634. A first latitudinal edge of the heatsinks 634 is immediately adjacent the front support bracket 647 and a second latitudinal edge of the heatsinks 634 is immediately adjacent the rear support bracket 642. When LED support structure 620 is installed in the cobra head housing and the lens frame assembly 612 is in the closed position, the LED support plate 650, the heatsinks 634, and the lens 614 may cooperate to form a substantially sealed optical chamber. The lens frame assembly 612 may abut the LED support plate rim 652 and/or the gasket 653. Also, the portions of the heatsinks 634 that are immediately adjacent to one another and the front support bracket 647 and rear support bracket 642, and portions of the exterior heatsinks 634 that are immediately adjacent the side protrusions 654 may substantially close off the support plate opening 651. In some embodiments material such as, for example, caulking, may be added at the locations where the heatsinks 634 are immediately adjacent to one another and/or where the heatsinks 634 are immediately adjacent the front support bracket 647 and rear support bracket 642, and/or to the locations where the exterior heatsinks 634 are immediately adjacent the side protrusions 654. In some embodiments one or more apertures may be provided through support plate 650 to allow electrical wiring for LED boards 630 to pass therethrough and the one or more apertures may be subsequently caulked.

[0077] The LED support plate 650 has a pyramidal top support bracket 656 coupled thereto and a pair of L-shaped rear support brackets 658 coupled thereto. The pyramidal top support bracket 656 may be coupled to one or more structures extending from an upper portion of the top housing portion 610. The pyramidal top support bracket 656 may support an LED driver or power supply at the top horizontally extending portion thereof, such as power supply 607 shown in FIG. 17. The rear support brackets 658 may be coupled to one or more structures extending from a rear portion of the top housing portion 610. The top support bracket 656 and the rear support brackets 658 appropriately maintain the LED support structure 620 within the cobra head housing. In alternative embodiments the LED support structure 620 may be otherwise maintained within the cobra head housing 620. For example, in some embodiments apertures may be provided through the LED support plate 650 proximal to the periphery thereof and the LED support plate 650 may be secured to the lens frame assembly 612 by fasteners extending through the apertures of the support plate 650 and received in corresponding apertures of the lens frame assembly 612.

[0078] An axis extends through the center of each LED board 630 from a first end 635 of each LED board 630 proximal to the front support bracket 647 to a second end 637 of each LED board 630 proximal to the rear support bracket 642. The two interior LED boards 630 are adjusted outwardly about their axis to orientations that are approximately twenty five degrees off from one another, each being adjusted outwardly about their axis to a sideways orientation that is approximately twelve and a half degrees off with respect to the plane generally defined by the lens frame 613. The two exterior LED boards 630 are adjusted outwardly about their axis to sideways orientations that are approximately one hundred and thirty degrees off from one another, approximately fifty-two and a half degrees off with respect to the orientation of the most proximal interior LED board 630, and approximately sixty-five degrees off with respect to the plane generally defined by the lens frame 613. The axes of the LED boards 630 are approximately parallel with one another and are all at approximately a ten degree forward tilt angle with respect to the plane generally defined by the lens frame 613. The axes of the two interior LED boards 630 are coplanar with one another and the axes of the two exterior LED boards 630 are coplanar with one another. However, the axes of all the LED boards 630 are not coplanar with one another, as the LED boards are arcuately arranged between the front support bracket 647 and the rear support bracket 642 with the exterior LED boards 630 being more proximal to the plane defined by the lens frame 613. In some embodiments the luminaire 600 may achieve an IES cutoff type III long distribution.

[0079] With reference to FIG. 21 and FIG. 22, a seventh embodiment of a LED luminaire 700 is depicted. A cobra head housing of LED Luminaire 700 is shown in phantom in FIG. 20. The cobra head housing has an upper housing portion 710 and a lens frame assembly 712 that surround an LED structure 720. The lens frame assembly 712 has a lens frame 713 supporting a flat lens 714. The lens frame assembly 712 is adjustable with respect to the upper housing portion 710 between an open or access position and a closed or installed position. In the installed position of the lens frame assembly 712 the lens frame 713 generally defines a plane. In some embodiments the cobra head housing may be a Cobra Head Housing manufactured by General Electric. Light emitted by the LED structure 720 exits the cobra head housing through the lens 714.

[0080] With particular reference to FIG. 21 LED structure 720 has four LED strips, each having an LED board 730 in thermal connectivity with a heatsink 734. Appropriate apertures have been drilled through the heatsink 734 for attaching LED boards 730 to the heatsinks 734 and for attaching heatsinks 734 to an arcuate outwardly and upwardly extending front bracket 747 and an arcuate outwardly and upwardly extending rear bracket 742. The two exterior LED boards 730 have eight LEDs 731 and corresponding optical pieces 732 paired with each LED 731. In some embodiments all eight LED optical pieces 732 on each of the two outermost LED boards 730 are twenty five degree LED collimator lenses. The two interior LED boards 730 have eight LEDs 731 that are not provided with a corresponding optical piece. LEDs 731 each have a central light output axis that is substantially perpendicular to a corresponding LED board 730 to which it is mounted.

[0081] Each LED board 730 and heatsink 734 is coupled between rear support bracket 742 and front support bracket 747. Screws 5 extend through apertures in rear support bracket 742 and front support bracket 747 and are received in corresponding apertures of each heat sink 734, thereby affixing each heatsink 734 and LED board 730 at a desired orientation. Front support bracket 747 and rear support bracket 742 are coupled to LED support plate 750 and are upwardly and outwardly extending from the LED support plate 750. When installed in the cobra head housing, the LED support plate 750 lies in substantially the same plane defined by lens frame 713. The LED support plate 750 has a LED support plate rim 752 provided along a periphery thereof. In some embodiments the LED support plate rim 752 may interface with a polyethelene gasket coupled to the lens frame assembly 713. In the depicted embodiment the periphery of the LED support plate 750 generally corresponds to the shape of the periphery of the lens 714 and a gasket may be compressed between the periphery of the lens 713 and the LED support plate rim 752 when LED support structure 720 is installed and lens frame assembly 712 is in the closed position.

[0082] The LED support plate 750 has an opening 751 therethrough. The heatsinks 734 extend rearward from the LED support boards 730 away from the opening 751. A portion of the longitudinal edge of each of the interior heatsinks 734 is immediately adjacent a portion of the longitudinal edge of one of the exterior heatsinks 734 and a portion of the other longitudinal edges of the interior heatsinks 734 are immediately adjacent one another. A pair of side protrusions 754 are coupled to and extend away from the support plate 750 and each have an edge that is provided immediately adjacent a portion of the other longitudinal edges of the exterior heatsinks 734. A first latitudinal edge of the heatsinks 734 is immediately adjacent the front support bracket 747 and a second latitudinal edge of the heatsinks 734 is immediately adjacent the rear support bracket 742. When LED support structure 720 is installed in the cobra head housing and the lens frame assembly 712 is in the closed position, the LED support plate 750, the heatsinks 734, and the lens 714 may cooperate to form a substantially sealed optical chamber. The lens frame assembly 712 may abut the LED support plate rim 752 and/or a gasket 753 that may be provided between lens frame assembly 712 and support plate 750.

[0083] The LED support plate 750 may be secured directly to the lens frame 713. The LED support plate 750 has two front apertures 776 and two rear apertures 777. Fasteners can extend through the two front apertures 776 and the two rear apertures 777 and be received in corresponding apertures of the lens frame assembly 712. In some embodiments the LED support structure 720 may be used to retrofit cobra head housings having an incandescent light source and the apertures in the lens frame assembly 712 may have previously supported a reflector for the incandescent light source.

[0084] The two interior LED boards 730 are adjusted inwardly about their axis to orientations that are approximately twenty five degrees off from one another, each being adjusted inwardly about their axis to a sideways orientation that is approximately twelve and a half degrees off with respect to the plane generally defined by the lens frame 713. The two exterior LED boards 730 are adjusted inwardly about their axis to sideways orientations that are approximately one hundred and thirty degrees off from one another, approximately fifty-two and a half degrees off with respect to the orientation of the most proximal interior LED board 730, and approximately sixty-five degrees off with respect to the plane generally defined by the lens frame 713. The axes of the LED boards 730 are approximately parallel with one another and are all at approximately a ten degree forward tilt angle with respect to the plane generally defined by the lens frame 713. The axes of the two interior LED boards 730 are coplanar with one another and the axes of the two exterior LED boards 730 are coplanar with one another. However, the axes of all the LED boards 730 are not coplanar with one another, as the LED boards are arcuately arranged between the front support bracket 747 and the rear support bracket 742 with the exterior LED boards 730 being more proximal to the plane defined by the lens frame 713. The inward orientation of the LED boards 730 provides cross light output, whereby light output from LEDs 731 on an individual LED board 730 will intersect with light output from LEDs 731 on at least one other LED board 730.

[0085] The foregoing description has been presented for purposes of illustration. It is not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching. It is understood that while certain forms of the LED luminaire have been illustrated and described, it is not limited thereto except insofar as such limitations are included in the following claims and allowable functional equivalents thereof.