Abstract: A thermal management and heat transfer system for light fixtures. And in particular, light fixtures comprising LED lights requiring lower temperatures than those required by incandescent of neon based light fixtures. The heat transfer includes taking advantage of the thermal updrafts caused by free convection of waste heat to cool the fixture.

Abstract: A cost effective illumination control system calculating motion and daylight or surrounding light inputs, particularly in large structures where the light distribution is not uniform across time. The system divides the structure into zones each having input capability with regard to occupation and background light levels. Each zone being able to make independent decisions with regard to control of lighting levels in the zone, yet the zones being able to cooperate in a coordinated fashion to provide uniform lighting to the structure as a whole.

Abstract: In a sealed recessed lighting fixture having a housing forming a ceiling-alignment plane and a light-emitting opening, at least one elongate lamp mounted to and within the housing and defining a fixture direction, at least one reflector surface parallel to the fixture direction, and a lens, the improvement wherein the at least one reflector surface is/are part(s) of a unibody-reflector assembly which includes: (a) two reflector sections terminating in longitudinal inner edges forming a gap therebetween; (b) a distal edge perimetrically along the light-emitting opening of the housing; (c) a seal between the distal edge and the housing at the opening; (d) two opposed substantially parallel endwalls each having a lens-engaging proximal edge; (e) the lens being an elongate shaped member terminating at opposite lens ends, the lens enveloping the at least one lamp and being of substantially constant cross-section along its length, whereby the unibody-reflector assembly is removable from the housing as a single unit

Abstract: In a sealed recessed lighting fixture having a housing forming a ceiling-alignment plane and a light-emitting opening, at least one elongate lamp mounted to and within the housing and defining a fixture direction, at least one reflector surface parallel to the fixture direction, and a lens, the improvement wherein the at least one reflector surface is/are part(s) of a unibody-reflector assembly which includes: (a) two reflector sections terminating in longitudinal inner edges forming a gap therebetween; (b) a distal edge perimetrically along the light-emitting opening of the housing; (c) a seal between the distal edge and the housing at the opening; (d) two opposed substantially parallel endwalls each having a lens-engaging proximal edge; (e) the lens being an elongate shaped member terminating at opposite lens ends, the lens enveloping the at least one lamp and being of substantially constant cross-section along its length, whereby the unibody-reflector assembly is removable from the housing as a single unit

Abstract: An indirect luminaire optical system having linear tubular lamps, parabolic reflector assemblies positioned under the lamps, kick reflectors positioned adjacent to the sides of the lamps, and a housing positioned around the lamps and reflectors, with the housing having a substantially open top for allowing light to exit the optical system. Each parabolic reflector assembly may have a pair of substantially parabolic shaped reflectors joined to form a apex along and directly under the corresponding lamp lamp. The kick reflectors may be in a spaced relationship with the parabolic reflector assemblies, thereby defining openings therebetween. The bottom portion of the housing may have translucent areas which are in optical communication with the lamp through the openings.

Abstract: A suspended indirect linear fluorescent luminaire utilizing a parabolic reflector assembly and kick reflector members in conjunction with large luminous lenses as viewed from below. The kick reflector members are suspended from the upper section inner edges of each lens member. The parabolic reflector assembly is positioned under the linear fluorescent lamp to redirect a portion of the light emitted from the underside of the lamp toward the kick reflector members and toward the area of the lens members behind the kick reflector members. Thus, the lens members may be evenly illuminated without a shadow from the kick reflector member, and the optical system of the luminaire may provide a wide light distribution so that the luminaire may have short suspension distances.

Abstract: A luminaire optical system having a tubular lamp, a parabolic reflector assembly, a pair of kick reflector assemblies, and a housing. The parabolic reflector assembly has a pair of substantially parabolic shaped reflectors joined to form a apex along and directly under the lamp. The kick reflector assemblies are each in a spaced relationship with the parabolic reflector assembly, thereby defining openings between the parabolic reflector assembly and the kick reflector assemblies. The housing has translucent areas which are in optical communication with the lamp through the openings.