High-pressure metal vapour discharge lamp

Details High-pressure metal vapour discharge lamp High-pressure metal vapour discharge lamp

H - Electricity

01

J

313/10

H01J 61/54 (2006.01)

Patent

CA 1190957

ABSTRACT: The invention relates to a high-pressure metal vapour discharge lamp having a ignition auxiliary means (13) externally of the discharge vessel. The external ignition auxiliary means is connected electrically to a first main electrode (5) and in the inoperative condition of the lamp extends along the wall of the discharge vessel up to at most 3 mm beyond one end of a second main electrode (6). According to the invention the external ignition element extends at the level of the first main electrode over at most 3 mm along the first main elec- trode from the end of the first main electrode. In this manner a regular ignition of the lamp is obtained, varia- tion intthe ignition voltage pulse required for ignition being considerably restricted.

411544

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