In fact, cold light is a light source that uses biological, chemical and electrical energy to excite. It has very good optical and variable flash characteristics. When an object emits light, its temperature is not higher than the ambient temperature, and this kind of light emission is called a cold light source.　　

　　So the question arises? What is UVLED cold light source and does UVLED belong to cold light source? In fact, UVLED is recognized as a cold light source, LED is the use of electron-hole pairs of composite light, is a typical cold light source light mode. But does not mean that UVLED is issued by the cold light, cold light source in the scientific point of view to understand, should be its light while not producing infrared wavelengths, because infrared wavelengths are triggered by the molecular structure of the irradiated material to occur in the energy rise, which makes the irradiated material to produce temperature rise, it is based on this, UVLED produces a single UV wavelengths, not infrared waves.　

　　Some people may ask: Why is the temperature of UVLED light is very high? This is actually also related to the UV light emitted by UVLEDs. UV light belongs to the short-wave invisible light, the light source energy is relatively high, all by the UV light irradiation object temperature rise is relatively fast.