Metal halide lamp

Details Metal halide lamp Metal halide lamp

2004-07-22

2008-12-23

Ton, Toan (Department: 2889)

Electric lamp and discharge devices

With gas or vapor

With particular gas or vapor

C313S637000, C313S640000, C313S641000, C313S642000, C313S643000

Reexamination Certificate

active

07468585

ABSTRACT:
A metal halide lamp of the present invention has an arc tube formed of ceramic and a pair of opposing electrodes. This lamp includes a Pr (praseodymium) halide, a Na (sodium) halide, and a Ca (calcium) halide enclosed within the arc tube. The Pr halide content Hp [mol], the Na halide content Hn [mol], and the Ca halide content Hc [mol] satisfy the relationships of 0.4≦Hc/Hp≦15.0 and 3.0≦Hn/Hp≦25.0.

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International Search Report for corresponding PCT/JP2004/010789, mailed Nov. 9, 2004.

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