High-pressure discharge lamp.

摘要

The high-pressure discharge lamp has a filling in a discharge vessel (1) which comprises a rare gas and a metal compound (2) chosen from hafnium halides and zirconium halides. The halide evaporates and discomposes to form incandescent, condensed metal particles. The lamp may be electrodeless and may in addition contain a buffer gas as a component of its filling. Alternatively, the lamp may have internal electrodes (13) and contain mercury (12) as a buffer gas. The lamp has favourable light generating properties, in particular a good colour rendering, and in addition may have a very high luminous efficacy. <IMAGE>