scandium halide
1.Metal halide gas-discharge lamps possess the advantages of small sige,high luminous efficiency,long life good start quality,simply appending power supply .They are widely use in movie projectors and overhead projectors etc.The metal-halide gas-discharge lamps include metal halide lamps with dysposium iodide, mercury lamps metal halide lamps with scandium-sodium iodides and metal halide lamps with sodium-thal-lium-indium etc.
