The biggest advantage of the metal halide lamp is that the luminous efficiency is particularly high, the luminous efficiency is as high as 80 to 90 Lm/W, and the heat is less when the normal light is emitted, so it is a cold light source. Since the spectrum of the metal halide lamp is a dense linear spectrum superimposed on the continuous spectrum, the color rendering index is particularly high, that is, the color reduction property is particularly good, up to 90%. In addition, the metal halide lamp has a high color temperature of 5,000 to 6000 K, and a dedicated projector lamp can reach 7,000 to 20,000 K. Under the same brightness condition, the higher the color temperature, the brighter the human eye feels. Due to the high brightness and small volume, the metal halide lamp has a relatively short life. Due to limitations in materials and processes, the current domestic metal halide lamp has a lifetime of 8,000 hours.
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