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A lighting luminaire for use in a refrigerated display case includes an LED mounting portion comprising a plurality of light emitting diodes (“LEDs”) mounted thereon, a reflector, and a lens. The LED mounting portion and reflector are sized and arranged to form a reflective cavity for diffusing and

A lighting luminaire for use in a refrigerated display case includes an LED mounting portion comprising a plurality of light emitting diodes (“LEDs”) mounted thereon, a reflector, and a lens. The LED mounting portion and reflector are sized and arranged to form a reflective cavity for diffusing and directing light from the plurality of LEDs through the lens and out of the luminaire. The LED mounting portion and reflector are either attached to each other as separate components or are integrally formed. The lens is held in place in the luminaire between the LED mounting portion and the reflector or is mounted directly on the LED mounting portion over the plurality of LEDs. The LED mounting portion and/or reflector have a reflective surface for reflecting light emitted by the LEDs. Methods for retrofitting an existing luminaire in a refrigerated display with an LED luminaire are also provided.

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1. A luminaire comprising: an LED mounting portion comprising a plurality of LEDs mounted thereon;a reflector; anda lens,wherein the LED mounting portion and reflector are sized and arranged to form a reflective cavity for diffusing and directing light from the plurality of LEDs through the lens and

1. A luminaire comprising: an LED mounting portion comprising a plurality of LEDs mounted thereon;a reflector; anda lens,wherein the LED mounting portion and reflector are sized and arranged to form a reflective cavity for diffusing and directing light from the plurality of LEDs through the lens and out of the luminaire,wherein the lens is held in place in the luminaire between the LED mounting portion and the reflector or is mounted directly on the LED mounting portion over the plurality of LEDs, andwherein the reflector is repositionable within the luminaire so as to allow the direction of light exiting the luminaire to be adjusted. 2. The luminaire of claim 1, wherein the luminaire is mounted on a shelf of a display. 3. The luminaire of claim 2, wherein a thermal insulation pad is located between the luminaire and the shelf. 4. The luminaire of claim 1, wherein the LED mounting portion and reflector are separate components and are removably attached to each other. 5. The luminaire of claim 4, wherein the LED mounting portion and reflector are attached to each other with one or more countersunk rivets. 6. The luminaire of claim 1, wherein the luminaire is attached to a shelf of a display with one or more countersunk rivets. 7. The luminaire of claim 1, wherein one or more surfaces of the luminaire have a water shedding surface for directing condensation away from the plurality of LEDs and off the luminaire. 8. A luminaire comprising: an LED mounting portion comprising a plurality of LEDs mounted thereon;a reflector;a lens; anda thermal insulation pad for mounting the luminaire to a surface,wherein the LED mounting portion and reflector are sized and arranged to form a reflective cavity for diffusing and directing light from the plurality of LEDs through the lens and out of the luminaire, andwherein the reflector is repositionable within the luminaire so as to allow the direction of light exiting the luminaire to be adjusted. 9. The luminaire of claim 8, wherein the surface is a shelf of a refrigerated display. 10. A luminaire comprising: an LED mounting portion comprising a plurality of LEDs mounted thereon;a reflector; anda lens,wherein the LED mounting portion and reflector are sized and arranged to form a reflective cavity for diffusing and directing light from the plurality of LEDs through the lens and out of the luminaire, and wherein the reflector is repositionable within the luminaire so as to allow the direction of light exiting the luminaire to be adjusted. 11. The luminaire of claim 1, wherein the luminaire comprises at least a first pair of grooves and a second pair of grooves, wherein the reflector may be retained by the first pair of grooves to reflect light out of the luminaire in a first direction and wherein the reflector may be retained by the second pair of grooves to reflect light out of the luminaire in a second direction different from the first direction. 12. The luminaire of claim 8, wherein the luminaire comprises at least a first pair of grooves and a second pair of grooves, wherein the reflector may be retained by the first pair of grooves to reflect light out of the luminaire in a first direction and wherein the reflector may be retained by the second pair of grooves to reflect light out of the luminaire in a second direction different from the first direction. 13. The luminaire of claim 10, wherein the luminaire comprises at least a first pair of grooves and a second pair of grooves, wherein the reflector may be retained by the first pair of grooves to reflect light out of the luminaire in a first direction and wherein the reflector may be retained by the second pair of grooves to reflect light out of the luminaire in a second direction different from the first direction.