Method of operating a metallic vapor discharge lamp

Electric lamp and discharge devices: systems – Combined load device or load device temperature modifying... – Filament or electric heater in series with a discharge...

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315 50, 313638, 313639, 313642, 250504R, H01J 744

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active

054898196

ABSTRACT:
The method of conducting a lighting operation of a metallic vapour discharge lamp, to maintain a suitable arc tube temperature, even if the lamp is operated at an input power higher than 160 W/cm of lighting length. A metallic vapour discharge lamp, in which mercury, rare gas, iron and halogen are encapsulated wherein an arc tube is used and which is operated with an internal pressure of 0.5 to 10 psi, an input power of higher than 160 W/cm of lighting length and within a heater having an air injection cooling system. The lamp characteristics are D.ltoreq.28 and simultaneously P/D.ltoreq.14, where the arc tube external diameter is designated D (mm) and the input power/cm of lighting length is designated P (W/m).

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patent: 4591724 (1986-05-01), Fuse et al.
patent: 4769576 (1988-09-01), Ohyama et al.
patent: 5107178 (1992-04-01), Ohyama et al.

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