Ceramic discharge metal halide lamp
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Ceramic discharge metal halide lamps are a relatively new source of light that is a variation of the mercury-vapor lamp. The discharge is contained in a ceramic tube. During operation, the temperature of this ceramic tube can exceed 1200 Kelvin. The ceramic tube is filled with mercury, argon and metal halide salts. Because of the high wall temperature, the metal halide salts are partly evoporated. Inside the hot plasma, these salts are dissociated into metallic atoms and iodine. The metallic atoms are the main source of light in these lamps, creating a bluish light that is close to daylight with a CRI (color rendering index) of up to 96. The exact correlated color temperature and CRI depend on the specific mixture of metal halide salts. Ceramic discharge metal halide lamps are five times brighter than comparable tungsten incandescent light bulbs.
Applications for these lamps include television and film making as well as shop lighting, digital photography and architectural lighting.
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