High pressure discharge lamp for vehicle headlamps, comprises an inner bulb with a discharge chamber having an ionizable filling made from a noble gas, mercury and a metal halide mixture

摘要

High pressure discharge lamp comprises an inner bulb (1) with a discharge chamber, electrodes extending into the discharge chamber, and optionally an outer bulb (2) surrounding the inner bulb. The discharge chamber has an ionizable filling made from a noble gas, 0-10 mg mercury and a metal halide mixture containing 40-80 wt.% sodium halide, 25-55 wt.% scandium halide, 1-15 wt.% indium halide, and 0-34 wt.% thallium halide. Independent claims are also included for the following: (1) Ionizable filling made from a noble gas, 0-10 mg mercury and a metal halide mixture containing 40-80 wt.% sodium halide, 25-55 wt.% scandium halide, 1-15 wt.% indium halide, and 0-34 wt.% thallium halide; and (2) Illuminating unit, especially a vehicle headlight, containing the high pressure discharge lamp.