metal-halide lamp



  • (written as metal halide lamp)
    A high intensity discharge (HID) lamp that produces light from a metal vapor such as mercury or sodium.


  • A halide lamp in which the contained gas is a mixture of a metallic vapor, such as mercury, and a halide of a metal, such as thallium iodide. Such lamps are very powerful, and are used, for instance, in portable projectors and to illuminate roadways.