| 摘要 |
This invention provides a metal halide lamp and a lighting equipment that, despite the fact that mercury is not filled, can provide electrical characteristics comparable with a mercury-contained metal halide lamp and can provide luminescent characteristics favorably comparable with the mercury-contained metal halide lamp. A metal halide lamp MHL includes a hermetically sealed vessel 1 , a pair of electrodes 2 , and a discharge medium filled in the hermetically sealed vessel. The discharge medium contains a first halide, a second halide, and a rare gas. The first halide is composed mainly of a halide of a luminescent metal and contains a halide of thulium (Tm) filled at the highest filling ratio in all of metal halides filled in the hermetically sealed vessel, and the content of an alkali metal halide in the first halide is less than 10% by mass at the highest. The second halide is composed mainly of a metal halide for constituting a lamp voltage, and the content of the second halide is 5 to 20% by mass with respect to all of the metal halides filled in the hermetically sealed vessel. The discharge medium is substantially free from mercury.
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