Four lamp modular lighting control

Details Four lamp modular lighting control Four lamp modular lighting control

H - Electricity

05

B

315/44

H05B 41/392 (2006.01)

Patent

CA 1204815

FOUR LAMP MODULAR LIGHTING CONTROL ABSTRACT The invention is directed to a circuit and a method for efficiently controlling the output illumination level of a gas discharge lighting arrangement having four or more gas discharge lamps with multiple ballasts. Load side control of each ballast is provided by a timed interval controlled impedance, serially coupled between the particular ballast and its associated lamps. A circulating inductor, coupled in parallel with each controlled impedance, provides a current path between the power source and the lamps at least during that portion of the AC waveform when the controlled impedances are non-conducting. The invention is equally operable at both 120 volt and 277 volt AC levels without major component changes.

410134

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