LED is a cold light source. Why does it burn?
LED is a cold light source, not that LED does not emit heat, but that the light it emits does not contain infrared rays, or that its light is cold light;
The so-called LED is a cold light source, which means that the energy conversion rate is relatively high, and most of the electricity is converted to light. The heat is small, but there is still a small amount of heat, so it will be hot.
Because it does not contain the light emitted by the infrared, so LED itself rather than with the power of the ordinary light bulb more heat, this is because the ordinary incandescent lamp while only 2--5% converting electrical energy into visible light, but the remaining power mostly in the form of light and infrared emitted together, and although there are about 30% LED the conversion of electric energy into visible light, but no infrared, 70% electric energy converted into heat remaining.
