Metal halide lamp for operation with a mercury ballast

Details Metal halide lamp for operation with a mercury ballast Metal halide lamp for operation with a mercury ballast

H - Electricity

05

B

355/47, 315/56

H05B 41/18 (2006.01) H01J 61/56 (2006.01)

Patent

CA 1144283

9 47,712 ABSTRACT OF THE DISCLOSURE A metal halide high-intensity discharge lamp for connection to a constant wattage-type ballast including a transformer with a secondary having a capacitor connected in series circuit arrangement therewith. The lamp in- cludes starting aid means including a voltage doubler com- prising a diode and two resistors operating in conjunction with the ballast capacitor. The starting aid means fur- ther comprises a normally closed heat-responsive switch means operative to prevent voltage stress on the diode after the lamp starts.

350492

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