High cri metal halide lamp with constant color throughout life

Details High cri metal halide lamp with constant color throughout life High cri metal halide lamp with constant color throughout life

H - Electricity

01

J

H01J 61/20 (2006.01) H01J 61/12 (2006.01)

Patent

CA 2292091

A metal halide lamp with high color rendering index, greater then 80, with substantially constant color temperature through life. The lamp arc discharge vessel has a small volume, i.e., less than 1 cc, and contains iodides of sodium, scandium, lithium, dysprosium, and thallium along with mercury, a buffer gas and scandium metal. The addition of the scandium metal does not raise the arc discharge vessel temperature and significantly reduces the color temperature decline during life.

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