Mercury-metal halide discharge lamp

Details Mercury-metal halide discharge lamp Mercury-metal halide discharge lamp

1979-04-03

1981-01-27

Demeo, Palmer C.

Electric lamp and discharge devices

With support and/or spacing structure for electrode and/or...

For plural electrodes of discharge device

313229, H01J 6122

Patent

active

042477980

ABSTRACT:
Metal halide discharge lamps based on sodium and scandium iodides show improved color rendering without important loss of efficacy by the inclusion of lithium iodide, especially in the molar proportion of 10-50% LiI based on the total of Li, Na and Sc iodides. The ratio of alkali metal of SC iodides should be between 5.4:1 and 57.5:1. Especially preferred are lamps with less than 10 molar % ScI and the lamps may additionally contain caesium iodide to broaden the emission spectrum.

REFERENCES:
patent: 3234421 (1966-02-01), Reiling
patent: 3262012 (1966-07-01), Koury et al.
patent: 3911308 (1975-10-01), Akutsu et al.
patent: 3979624 (1976-09-01), Liu et al.

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