Abstract: A heat management system has a first heatsink coupled to a support surface. At least one heat pipe has a heat absorbing end in thermal connectivity with the first heatsink and a heat releasing end in thermal connectivity with a second heatsink.

Abstract: An emergency sign power supply with battery charger is provided. In some embodiments the battery charging circuit is formed by a single diode and a single resistor.

Abstract: An LED downlight fixture comprises an array of LEDs in thermal connectivity with a heatsink, the array of LEDs positioned adjacent a first aperture of a multi-piece reflector assembly, the multi-piece reflector assembly including a first reflector having the first aperture disposed in an upper portion of the first reflector and an opposed larger second aperture in a lower portion of the first reflector, a second reflector having a first aperture positioned adjacent the second aperture of the first reflector and a second aperture opposite the first aperture of the second reflector and defining a light exit passageway, a diffuser positioned proximal to and extending across the second aperture of the first reflector and the first aperture of the second reflector.

Abstract: A LED dimming circuit is provided. The LED dimming circuit has an LED driver, an LED dimmer, and at least one LED light source. A resistor is connected between a dimming control output of the LED dimmer and dimming control input of the LED dimmer. The LED dimming circuit may optionally include a fluorescent slide dimmer. The fluorescent slide dimmer may have a first connection to the dimming control input of the LED dimmer and a second connection to a circuit common of the LED dimmer. A method of providing an LED dimming circuit for dimming at least one LED light source using a fluorescent dimmer is also provided.

Abstract: A LED luminaire comprises a heat sink disposed above an LED array and in thermal communication with the LED array, the LED array having at least one red LED and a plurality of cool white LEDs, the at least one red LED providing a warmer correlated color temperature for an output light and the plurality of white LEDs providing a higher efficacy, a diffuser positioned to enclose the LED array between the heat sink and the diffuser, the diffuser color mixing the at least one red LED and the plurality of cool white LEDs rendering a red light from the at least one red LED indiscernible from a cool white light of the plurality of white LEDs, a reflector positioned adjacent the heat sink.

Abstract: An emergency lighting system comprises a wall unit housing that may readily be located and secured between wall studs in a conventional structure. The housing includes a rotatable door to which an emergency lamp is secured, said door being in a closed position when main electrical power is on such that the lamp is hidden within the housing. The rotatable door is coupled to a motor that is supplied battery power when main electrical power loss is detected, thereby rotating the door to an open position and exposing the emergency lamps. The emergency lamps are also illuminated by battery power.

Abstract: A power supply for an emergency light includes a battery and battery charging circuit. The battery charging circuit is formed by two diodes and two resistors and possibly a capacitor.

Abstract: A dimming control for a high intensity lighting system uses a single additional control wire for control of the dimming function. The lighting system operates on multi-phase power. A transmitter for transmitting a control signal over the single control wire is connected between two of the phases of the multi-phase power supply, or between one phase and neutral. The transmitter, upon the occurrence of a predetermined condition, transmits a control signal to the single control wire. The control signal is a rectified portion of the power supply. The predetermined condition is motion as sensed by a motion sensor, operation of a timer, or operation of a manual switch. A receiver connected to the control line receives the control signal and switches the light to a low light output mode. The is accomplished by changing the capacitance of the ballast circuit for the light. Each lamp of the lighting system has a receiver connected to the single control wire.

Abstract: A control relay circuit and method for controlling a relay having a coil, for use, in particular, in operation of a light fixture circuit having an HID lamp. The relay control circuit has an input for receiving a control voltage signal and a voltage storage element connected across the input. The voltage storage element develops a voltage level as a function of time in response to the control voltage signal. A thyristor circuit, a switching element and the coil of the relay form a series circuit that is connected in parallel to voltage storage element A switch controller is connected in parallel to the voltage storage element and is also connected to the switching element.