Metal Halide Discharge Lamps
ANSWER
Metal halide lamps are generally used in commercial interiors, industry and floodlighting, and (in smaller ratings) for retail lighting.
They have quartz or sintered alumina (ceramic) arc tubes, with an outer glass envelope. The light output is from mercury and other metallic elements introduced in the form of halides. There is a wide range of colour appearance and colour rendering is good.
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