Like the traditional light sources, the semiconductor light-emitting diode (LED) also produce heat during working, their heat depends on the overall luminous efficiency. Under the action of the applied electricity, electron and hole radiative recombination produce the electroluminescence, the light in the vicinity of the PN junction need to radiate out of the semiconductor media and package of LED chip, and then reach the outside. Integrated the current injection efficiency, luminescent quantum efficiency and chip emitting efficiency, ultimately only about 30-40% of the input energy is turned into light, the remaining 60-70% of the energy convert to thermal mainly by the way of the non-radiative and combinative generated lattice vibration.