Abstract: A recessed LED ceiling light fixture kit for installation to a ceiling panel or plaster frame in residential homes or commercial buildings is disclosed. The kit includes an LED engine with at least one LED facing downward, an LED driver, and an annular shaped, finned heat sink that receives the LED driver therein and the LED underneath. The fixture includes a tubular-shaped can having an open bottom and a top engaging the heat sink. Detachable can retainer springs or threaded fasteners engage the can at its circumference, wherein the springs mount the can to the ceiling panel, or alternatively, the fasteners attach the can to the plaster frame. A trim ring is snapped onto the can at its open bottom, and an electrical junction box sits on top of the heat sink.

Abstract: A recessed LED ceiling light fixture kit for installation to a ceiling panel or plaster frame in residential homes or commercial buildings is disclosed. The kit includes an LED engine with at least one LED facing downward, an LED driver, and an annular shaped, finned heat sink that receives the LED driver therein and the LED underneath. The fixture includes a tubular-shaped can having an open bottom and a top engaging the heat sink. Detachable can retainer springs or threaded fasteners engage the can at its circumference, wherein the springs mount the can to the ceiling panel, or alternatively, the fasteners attach the can to the plaster frame. A trim ring is snapped onto the can at its open bottom, and an electrical junction box sits on top of the heat sink.

Abstract: A dimming system and method suitable for any type of magnetic ballast operating a gaseous discharge lamp. The dimming system operates to selectively vary the number of turns of the ballast winding in operative connection with the lamp to thereby effect a change in the impedance of the ballast, the power provided to the lamp, and ultimately the brightness of the lamp. The system may be operated such that the brightness of the lamp is selected responsive to the detection of an external stimulus such as motion or sound within the space to be illuminated.

Abstract: A ballast for lighting an auxiliary source of illumination whenever a primary source of illumination fails to ignite. The auxiliary source of illumination is effectively turned OFF by placing a short circuit thereacross whenever the primary source of illumination is lit. The short circuit is removed whenever the primary source of illumination fails to reach a predetermined level of illumination thereby permitting current to flow through and light the auxiliary source of light. The ballast also includes a power factor correction device for increasing the ballast power factor when the primary source of light reaches a predetermined level of illumination.

Abstract: A lighting system having a primary light source and an emergency lamp. The emergency lamp is turned on and remains on upon failure or removal from the system of the primary light source. The system also includes a control device for sensing when the voltage across the primary light source rises above a predetermined level in determining when to turn on the emergency lamp.

Abstract: A connector including two interfitting tubular elements and a locking ring having at least two staggered rows of locking lugs cooperating with corresponding locking lugs of one of the tubular elements. The locking lugs are inscribed in cylindrical surfaces having different radii, so that when the ring is inserted on the element, its lugs slide effortless on the lugs of the first lug row of the element to a position where the lugs of each lug row of the ring can pass between those of a corresponding row of the element to form a plurality of bayonet couplings which can then be simultaneously locked.