| abstract |
A metal halide that emits light of three colors, red light, green light, and blue light, and that can easily adjust the balance of the light of these three colors and that has excellent durability against changes over time. Provide a lamp. SOLUTION: A luminous tube 3 made of translucent alumina, and additives enclosed in the luminous tube 3 made of alumina include lithium iodide that emits red light, thallium iodide that emits green light, and A metal halide lamp comprising a substance that emits blue light, the energy ratio of the red light, green light, and blue light being adjustable by the amount of lithium iodide and thallium iodide enclosed. [Selection] Figure 3 |