LED, as a new type of semiconductor light source, has the following advantages compared to traditional light sources: long lifespan, emitting time up to 100000 hours; The startup time is short, and the response time is only a few tens of nanoseconds; Solid structure, as a solid all solid structure, capable of withstanding strong oscillations and impacts; High luminous efficiency and low energy consumption, making it an energy-saving light source; The luminous body is close to a point light source, and the radiation model of the light source is simple, which is conducive to lamp design; The directionality of light emission is very strong, and there is no need to use a reflector to control the direction of light irradiation. It can be made into a thin lamp, suitable for situations where there is not too much installation space.