K LED Downlight

 Heat source: the use of heat excitation light sources such as incandescent lamps at 3,000-4,000 K  LED Downlight  temperature thermal radiation emission. Incandescent lamps 80 to 90% of the energy is converted to heat, about 10% of the energy is converted to light energy. Therefore, the luminous efficiency is low. We are not under the lamp housing is defined as the temperature of cold light, or heat sources. Lighting around the high and low temperature, can only judge the merits of the lamp cooling measures. LED Strip

Difference between cold light and hot light, we can not come only from the definition of distinction. In fact we are talking about does not mean cold light source emitting the process does not generate heat, but not by way of the luminous energy is converted to light energy. Is  GU10 typical of the incandescent electric energy into heat energy, and then the process of thermal energy into light energy. Heat loss is higher, low luminous efficiency, according to the current development trend of white LED cold light alternative heat source era whom far away. So we can put LED as a cold source.