The allowable increase in temperature when the lamp is working is also a marking method to measure the heat dissipation capacity of the radiator.
We know that incandescent lamps and gas discharge lamps (including fluorescent lamps, high-pressure sodium lamps, and metal halide lamps) generally do not require special heat sinks to dissipate heat. Only LED solid-state lighting lamps need special radiators to dissipate heat. This is also an LED semiconductor. The special feature of the lighting.
The LED semiconductor lighting chip emits light when it is working, and its light does not contain ultraviolet and infrared, so its light cannot take away heat; therefore, the temperature of the chip will rise when it is working. In order to ensure that the temperature of the chip does not rise too high when the chip is working, it is necessary to install a heat sink for the LED.
The light decay of the LED is related to its junction temperature. The so-called junction temperature is the temperature of the semiconductor PN junction. The higher the junction temperature, the earlier the light decay occurs, that is, the shorter the lifetime.
Different LED chips have different light decay curves, and their thermal resistance and heat dissipation are also very different.
