Cold light source features

The characteristic of the cold light source is that almost all of the other energy is converted into visible light, the light of other wavelengths is small, and the heat source is different. In addition to visible light and a large amount of infrared light, a considerable part of the energy is converted into no contribution to lighting. Infrared light. The light from the heat source plus the infrared filter should be almost the same as the light from the cold light source, because the infrared light has been filtered out.