What is a cold light source? The main difference between the cold and hot light source is whether the illuminating light source contains the infrared spectrum. The cold light source is an illuminating light source that contains almost no infrared spectroscopy. The cold light source is characterized by converting all the electric energy into heat energy and visible light, and other wavelengths of light are few. The heat source is different. In addition to visible light, there is a large amount of infrared light, and a considerable part of the energy is converted into infrared light that does not contribute to the illumination. The LED light source is an illuminating light source that contains almost no infrared spectrum, so it is a typical cold light source. The traditional light source is the heat source.
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The LED is called a cold light source. Why is there so much heat?
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