Abstract: Described are embodiments of a light engine installation kit and methods of installation that allow a single technician to install large, heavy, or awkwardly shaped light engines into new or existing fixture housings. The installation kits include mounting brackets that install into the fixture housing. The mounting brackets can then support the light engine by a retention tab at one end, and a tether at the other. In this intermediate position, an installer can complete the wiring before raising the light engine into its final position. Also described are lenses, wireway covers, reflectors, and end caps that provide improved sealing of the lens compartment of a light engine. The fitting of the parts provides better sealing to prevent dirt, debris, or insects from migrating into the lens compartment of the light engine and causing reduced light output or unsightly dark spots in the lens.

Abstract: A light fixture includes a door frame, the door frame having at least one frame side and a reflector. The edge of the reflector engages a slot in the frame side, which includes at least one LED, to precisely position the reflector and the at least one LED relative to one another. The at least one frame side may also include a reflective kicker for reflecting light from the at least one LED onto the reflector. The reflector may include a semi-specular optical material, which specularly reflects some of the incoming light from the at least one LED and diffusely reflects other of the incoming LED light. The reflector may be collapsible for ease of transportation and shipping; the at least one frame side precisely positions the reflector and at least one LED during assembly and installation.

Abstract: A light emitting diode (“LED”) light module that can be installed in lighting fixtures—either new lighting fixtures or existing lighting fixtures already installed in the field. The LED light module includes a LED assembly mounted on a reflector. The LED light module is positioned in a light fixture housing to emit light from the fixture housing.

Abstract: Retrofit kits for retrofitting LED light engines into existing light fixture housings. The retrofit kit includes a hook bracket that may be mounted in the housing and from which an end of the LED light engine can be suspended so as to permit an installer to electrically connect the LED light engine. The retrofit kit also includes a mounting bracket to secure the free end of the LED light engine into the housing after the LED light engine has been rotated upwardly into the housing from the hanging position.

Abstract: A ceiling mount lighting fixture includes a channel, a channel cover, and a light source including a plurality of light-emitting diodes. The channel cover includes two sides that intersect in a V-shaped base, with light-emitting diodes mounted on each side. The light-emitting diodes emit light at cone angles that overlap at the base of the channel cover. The fixture may include a diffuser and an end cap positioned on each end of the channel, each end cap including a groove. A plurality of strips may be located on the diffuser, each strip moveable from a first position on the diffuser a distance from the end caps to a second position in which the strip engages the groove on one of the end caps, thereby serving as a light trap to block light from exiting gaps between the diffuser and end caps.

Abstract: A ceiling mount lighting fixture includes a channel, a channel cover, and a light source including a plurality of light-emitting diodes. The channel cover includes two sides that intersect in a V-shaped base, with light-emitting diodes mounted on each side. The light-emitting diodes emit light at cone angles that overlap at the base of the channel cover. The fixture may include a diffuser and an end cap positioned on each end of the channel, each end cap including a groove. A plurality of strips may be located on the diffuser, each strip moveable from a first position on the diffuser a distance from the end caps to a second position in which the strip engages the groove on one of the end caps, thereby serving as a light trap to block light from exiting gaps between the diffuser and end caps.

Abstract: A light fixture includes a door frame, the door frame having at least one frame side and a reflector. The edge of the reflector engages a slot in the frame side, which includes at least one LED, to precisely position the reflector and the at least one LED relative to one another. The at least one frame side may also include a reflective kicker for reflecting light from the at least one LED onto the reflector. The reflector may include a semi-specular optical material, which specularly reflects some of the incoming light from the at least one LED and diffusely reflects other of the incoming LED light. The reflector may be collapsible for ease of transportation and shipping; the at least one frame side precisely positions the reflector and at least one LED during assembly and installation.

Abstract: Surface mounted lighting fixtures having a troffer channel and a frame that extends around the troffer channel. The troffer channel includes a top wall and side walls. To impart a “back” to the fixture, the troffer channel is positioned in the frame so that the upper surface of the lighting fixture is defined by the top wall of the troffer channel and so that the fixture is mounted to a ceiling via the top wall of the troffer channel. The side walls of the troffer channel are preferably angled relative to the top wall to reflect light out of the fixture as desired. Tie brackets, lamp holder brackets, electrical components, and traditional louvers and lensed door components may be supported by the lighting fixture. An installation bracket may be provided to facilitate installation of the lighting fixture.

Abstract: Surface mounted lighting fixtures having a troffer channel and a frame that extends around the troffer channel. The troffer channel includes a top wall and side walls. To impart a “back” to the fixture, the troffer channel is positioned in the frame so that the upper surface of the lighting fixture is defined by the top wall of the troffer channel and so that the fixture is mounted to a ceiling via the top wall of the troffer channel. The side walls of the troffer channel are preferably angled relative to the top wall to reflect light out of the fixture as desired. Tie brackets, lamp holder brackets, electrical components, and traditional louvers and lensed door components may be supported by the lighting fixture. An installation bracket may be provided to facilitate installation of the lighting fixture.