Circuit arrangements or apparatus for operating incandescent light sources (structurally associated with the incandescent lamps H01K1/62)

Child Classifications

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• H05B 39/02 Switching on, e.g. with predetermined rate of increase of lighting current
• H05B 39/04 Controlling
• H05B 39/09 in which the lamp is fed by pulses
• H05B 39/10 Circuits providing for substitution of the light source in case of its failure