Increased efficacy high pressure sodium lamp yielded by increase

Details Increased efficacy high pressure sodium lamp yielded by increase Increased efficacy high pressure sodium lamp yielded by increase

1984-12-17

1986-01-28

Moore, David K.

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

313636, 313571, 313572, 313637, 313642, H01J 6120, H01J 6134

Patent

active

045673969

ABSTRACT:
A high pressure sodium lamp having an inner arc tube operated at an increased wall temperature so as to improve the efficacy of the lamp is disclosed. The improved high pressure sodium lamp has an arc tube which reduces the sodium losses typically experienced by high temperature operation. Also disclosed are desired parameters of the arc tube.

REFERENCES:
patent: 3248590 (1966-04-01), Schmidt
patent: 4285732 (1981-08-01), Charles et al.

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