The quality of the radiator of the lamp is the primary problem that directly affects the size of the light decay. The three basic methods of heat dissipation technology and heat transfer of the lamp housing are: conduction, convection and radiation. Thermal management also starts from these three aspects and is divided into transient analysis. And steady state analysis. The main transmission path of the radiator is conduction and convection heat dissipation, and the radiation heat dissipation under natural convection cannot be ignored. High-power LEDs are often used in lighting fixtures. At present, the luminous efficiency of commercial high-power LEDs is only 15% to 30%, and most of the rest of the energy is converted into heat. If heat is not effectively discharged, it will have serious consequences. High temperature will reduce the luminous flux of LED and its luminous efficiency, cause red shift of light wave, color cast, and cause aging of devices.
The most important thing is to reduce the life of LEDs exponentially, due to the light decay of LED or its lifetime. It is directly related to its junction temperature. The heat dissipation is not good, the junction temperature is high, and the life is short. According to the Arrhenius rule, the temperature will be extended by 2 times for every 10 °C decrease in temperature.