Metal halide lamp with improved lumen value maintenance

Details Metal halide lamp with improved lumen value maintenance Metal halide lamp with improved lumen value maintenance

2006-06-06

2006-06-06

Patel, Vip (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

With particular gas or vapor

C313S637000

Reexamination Certificate

active

07057350

ABSTRACT:
An arc discharge metal halide lamp having a discharge chamber having visible light permeable walls bounding a discharge region supported electrodes in a discharge region spaced apart by a distance Lewith an average interior diameter equal to D so they have a selected ratio with D exceeding a minimum value. Ionizable materials are provided in this chamber involving a noble gas, one or more halides, and mercury in an amount sufficiently small so as to result in a relatively low maximum voltage drop between the electrodes during lamp operation for a lamp dissipation sufficient to have the chamber wall loading exceed a minimum value or so as to maintain chamber luminosity above a minimum value for a selected operational duration.

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patent: 2005/0052139 (2005-03-01), Anami et al.

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