Metal halide lamp and lighting apparatus using the same

Details Metal halide lamp and lighting apparatus using the same Metal halide lamp and lighting apparatus using the same

2011-06-21

2011-06-21

Patel, Nimeshkumar D (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

Envelope with particular structure

C313S025000, C313S638000

Reexamination Certificate

active

07965042

ABSTRACT:
A metal halide lamp according to the present invention includes: an outer tube2; an inner tube3that is provided in the outer tube2, has a sealing portion10in at least one end portion, and is made of quartz glass; an inner tube3provided in the outer tube2; and an arc tube4provided in the inner tube3, wherein assuming that the outer tube2has a maximum outer diameter A (mm), the inner tube3has a maximum outer diameter B (mm), and the metal halide lamp1consumes P (W) of power, the following relationships are satisfied:in-line-formulae description="In-line Formulae" end="lead"?0.06P+15.8≦A≦25,in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0.05P+9.0≦B, andin-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?1.14≦A/B,in-line-formulae description="In-line Formulae" end="tail"?where P satisfies 20 W≦P≦130 W.

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