① combustion luminescence;
② incandescent luminescence: incandescent lamps, tungsten halogen lamps.
③ gas discharge discharge: fluorescent lamps, mercury lamps, sodium lamps, metal halide lamps.
(field luminescence, laser: induction lamps, xenon lamps Note: LED is the photoelectric effect of the crystal light, is a “cold light source” solid light source white light belongs to the first generation of light sources, the first through the fluorescent lamps for the second generation of light sources, in addition to fluorescent light, the other gas discharge lamps for the third generation of light sources, the fourth generation of light sources (ray laser!), is the third generation of gas discharge light sources, the fourth generation of light sources (ray laser), is the third generation of gas discharge light sources. Is the third generation of gas discharge light source, people are exploring a new generation of light sources, it is in the brightness, coherence and time structure are greatly superior to the third generation of gas discharge light source.
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