Patent ID: 9714759
Date: 2017-07-25
CPC Classifications: F21V,F21Y,H05B,Y02B

Claim:
1. A circuit for controlling power being supplied to a dc-powered light element in a lighting circuit, comprising a power control circuit arranged to connect directly to an output of an electronic ballast of the lighting circuit, the electronic ballast including a first inverter having at least two switches connected to a resonant tank, said power control circuit including a second inverter formed by at least two switching components, wherein a dc side of said second inverter is arranged to connect to said dc-powered light element, and wherein said second inverter is arranged to model input impedance characteristics for the electronic ballast so as to control an active power and a reactive power drawn from the electronic ballast, such that said power control circuit is further arranged to control and change a level of power being supplied to said dc-powered light element such that a maximum power received by the dc-powered light element is equal to a rated output power of the electronic ballast.