Abstract: A recessed light fixture has a heat sink and a removable light engine assembly. A thermally conductive base of the light engine assembly has an LED and has a thermal interface adapted for thermal coupling to a thermal interface of the heat sink. A mechanical connector in the enclosure can connect the base of the light engine assembly to the heat sink and couple the thermal interfaces of the light engine assembly and heat sink. The base of the light engine assembly is insertable through an opening in the ceiling aligned and can be urged into connected and disconnected states, from within the room, with a minimal clearance between the opening in the ceiling and the base, whereby the light engine assembly can be replaced or serviced from within the room without disturbing the ceiling and without the use of a large diameter trim.

Abstract: A recessed light fixture has a heat sink and a removable light engine assembly. A thermally conductive base of the light engine assembly has an LED and has a thermal interface adapted for thermal coupling to a thermal interface of the heat sink. A mechanical connector in the enclosure can connect the base of the light engine assembly to the heat sink and couple the thermal interfaces of the light engine assembly and heat sink. The base of the light engine assembly is insertable through an opening in the ceiling aligned and can be urged into connected and disconnected states, from within the room, with a minimal clearance between the opening in the ceiling and the base, whereby the light engine assembly can be replaced or serviced from within the room without disturbing the ceiling and without the use of a large diameter trim.

Abstract: A low-profile recessed light fixture has a housing with a low height and forming a light engine enclosure with an aperture. A light engine assembly within the light engine enclosure as a heat sink assembly and a light emitting element. The heat sink assembly has first and second heat sinks, and the light emitting element is mounted to the first heat. The first heat sink is operable to tilt relative to the second heat sink about a tilt a tilt range. The light engine assembly is operable to translate between an operation position and an offset service position. In the operation position at a zero tilt an optical axis of the light emitting element is substantially parallel to a vertical axis passes through a center of the aperture. The light engine assembly being operable to rotate relative to the housing through a rotation range of at least 360 degrees.

Abstract: A low voltage power distribution system that provides low voltage DC power to LED light fixtures and provides for backup or redundant power in the event of a failure of the one of the primary power supplies feeding the output channels to the respective LED light fixtures. The system allows for the automatic switching out of a failed power supply and the switching in of a spare power supply to minimize any down time for a output channel in the event of a primary power supply failure.

Abstract: A wall wash recessed light fixture has a light engine assembly has an aperture, an LED module operable to emit light through the aperture, a lens disposed between the LED module and the aperture, and a reflector disposed between the LED module and the lens. The LED module has an optical axis passing through the aperture and substantially parallel to a longitudinal axis (Z). The lens has a first side forming a plano-convex lens with a convex surface facing the LED module and has a second side with a Fresnel lens surface facing the aperture, and the lens is aligned at an oblique angle ?1 relative to the optical axis of the LED module. A diffuser is disposed between the lens and the aperture. The plano-convex lens has a principal axis aligned at the oblique angle ?1 relative to the optical axis of the LED module.

Abstract: A wall wash recessed light fixture has a light engine assembly has an aperture, an LED module operable to emit light through the aperture, a lens disposed between the LED module and the aperture, and a reflector disposed between the LED module and the lens. The LED module has an optical axis passing through the aperture and substantially parallel to a longitudinal axis (Z). The lens has a first side forming a plano-convex lens with a convex surface facing the LED module and has a second side with a Fresnel lens surface facing the aperture, and the lens is aligned at an oblique angle ?1 relative to the optical axis of the LED module. A diffuser is disposed between the lens and the aperture. The plano-convex lens has a principal axis aligned at the oblique angle ?1 relative to the optical axis of the LED module.

Abstract: A recessed light fixture has a heat sink and a removable light engine assembly. A thermally conductive base of the light engine assembly has an LED and has a thermal interface adapted for thermal coupling to a thermal interface of the heat sink. A mechanical connector in the enclosure can connect the base of the light engine assembly to the heat sink and couple the thermal interfaces of the light engine assembly and heat sink. The base of the light engine assembly is insertable through an opening in the ceiling aligned and can be urged into connected and disconnected states, from within the room, where a clearance between the opening in the ceiling and the base is no more than about 0.05 inches, whereby the light engine assembly can be replaced or serviced from within the room without disturbing the ceiling and without the use of a large diameter trim.

Abstract: A light fixture having an upper and lower housing, and a mounting bracket adapted to mount to a junction box. The light fixture has a relatively short mounting bracket for surface mount configurations, and a relatively long mounting bracket for recess mount configurations, and a difference in the height of the long and short mounting brackets is equal to the height of the junction box. In the surface-mount and recess-mount configurations a circumferential edge of the upper housing abuts the mounting surface so the lighting fixture has the same external appearance and size in both configurations. The light fixture also has a pendant mode wherein the upper housing is suspended from the junction box by an elongated support. An enclosure for the junction box has a plurality of cut-outs and covers to accommodate various configurations of surface mounted conduit.

Abstract: A lighting system has a lighting fixture with a housing and a pair of mounting brackets fixed to opposed sides of the housing and mounted to a hanger bar. Each mounting bracket is adapted to mount to a hanger bar without tools and the hanger bars are adapted to mount to the grid of rails without tools. The hanger bar can have first and second hanger bar members which are adapted to relatively move along a longitudinal axis (Y axis) of the hanger bar to extend and retract a length of the hanger bar. The mounting bracket is adapted to toollessly mount to the hanger bar at a predetermined vertical position (Z axis) and lateral position (X axis) relative to the hanger bar.

Abstract: A recessed lighting fixture for installation in an inclined ceiling has an enclosure and a lighting assembly pivotal relative to the enclosure through a first and second range of relative angles such that an optical axis can be aligned vertically for the first and second ranges. First and second trim element are adapted for use with the first and second ranges of inclinations. The first and second trim elements have optical element aligned at different angles, and a relative angle between the optical elements and the reflector plane is less than or equal to 10 degrees. An angle indicator provides a proper relative angle of the lighting assembly and a trim indicator provides an indication of a proper trim element.

Abstract: A lighting system has a lighting fixture with a housing and a pair of mounting brackets fixed to opposed sides of the housing and mounted to a hanger bar. Each mounting bracket is adapted to mount to a hanger bar without tools and the hanger bars are adapted to mount to the grid of rails without tools. The hanger bar can have first and second hanger bar members which are adapted to relatively move along a longitudinal axis (Y axis) of the hanger bar to extend and retract a length of the hanger bar. The mounting bracket is adapted to toollessly mount to the hanger bar at a predetermined vertical position (Z axis) and lateral position (X axis) relative to the hanger bar.