| 简介 |
Provided is a high-color-rendering and high-efficiency lamp in a metal halide lamp in the 100-W class or less. A metal halide lamp provided with a ceramic light-emitting tube and having a rated power of 35-100 W and a color temperature of 2800-3700 K, wherein a halogen additive is sealed as the light-emitting substance in the light-emitting tube, and the halogen additive comprises : (1) cerium (Ce); (2) sodium (Na); (3) calcium (Ca); (4) thallium (Tl); and (5) one or more rare earth metals selected from the group consisting of dysprosium (Dy), thulium (Tm), and holmium (Ho). The halogen additive is an iodide, and the composition ratios in the halogen additive are : 1.5 mol% to 3 mol% of cerium iodide; 45 mol% to 90 mol% of sodium iodide; 5 mol% to 15 mol% of calcium iodide; and 2 mol% to 7 mol% of thallium iodide. |
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