Patent ID: 8093792
Filing Date: 2012-01-10
Classification: H01K

Abstract:
1. An H1-type headlight lamp comprising an incandescent filament and a lamp vessel surrounding the incandescent filament, wherein the incandescent filament is constructed to generate a luminous flux, the value of which is greater than 2000 lm and greater than a predetermined permissible maximum value for the luminous flux of H1-type headlight lamps during lamp operation with a supply voltage of 13.2 volts, wherein the lamp vessel has a sealed-off end fixed in a lamp base, a dome positioned opposite from said sealed-off end, and an axially symmetrical lamp vessel section arranged between said sealed-off end and said dome, and wherein a surface of said dome and a part of said axially symmetrical lamp vessel section which adjoins said dome are covered by an opaque coating, said opaque coating providing a reduction of the luminous flux emerging from the headlight lamp during lamp operation to a value less than or equal to the predetermined permissible maximum value.