Low-cost power-reducing device for hid lamp

Details Low-cost power-reducing device for hid lamp Low-cost power-reducing device for hid lamp

H - Electricity

05

B

315/66

H05B 41/36 (2006.01) H05B 41/392 (2006.01)

Patent

CA 1058279

LOW-COST POWER-REDUCING DEVICE FOR HID LAMP ABSTRACT OF THE DISCLOSURE Add-on device for high-intensity-discharge lamp and ballast which reduces the wattage at which the lamp is operated. The add-on device has two parallel circuit paths, one of which is an RC circuit and the other of which com- prises a triac. A diac connects the gate of the triac to the midpoint of the RC circuit to control the time in each half-cycle of energizing potential that the triac fires. The predetermined relative values of the RC components and the rating of the diac control the time of firing of the triac in each half-cycle, and thus determine the wattage at which the lamp is operated.

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