Patent ID: 7649327

Claim:
A lighting fixture adapted to be dimmable by a thyristor-based dimmer, the fixture comprising: a power conditioning unit adapted to accept an AC electrical input and having an output, the power conditioning unit comprising; a switching MOSFET; a control circuit adapted to output a switching clock cycle and duty cycle that are generally fixed during normal operation of the power conditioning unit, the duty cycle and clock cycle adapted to gate the switching MOSFET; and a transformer having a primary winding configured to store electrical energy when the MOSFET is gated on, a secondary winding of the transformer receiving electrical energy from the primary winding and delivering it to the outlet; an impedance matching unit connected in series between a thyristor-based dimmer and the rest of the power conditioning unit, wherein the impedance matching resistor is chosen to prevent a false trigger by the thyristor-based dimmer; a lighting unit connected to the power conditioning unit output and adapted to receive electric power therefrom, the lighting unit comprising one or more light emitting diodes (LEDs); wherein the duty cycle, clock and transformer are chosen so that the primary winding discharges substantially all of the energy stored therein at least once per a predetermined number of clock cycles.