Through the high efficiency electro-optical conversion and reasonable heat control and disposal, reaching low power consumption, low temperature rise, high-brightness, long-range high performance; Using soft light control switch circuit, in order to reduce the impact of the work of state transitions, to extend the life of infrared light; To compensate for the difference between winter and summer infrared light radiated power, using a constant current regulator circuit, ensures the infrared light emitting diode power stable, thereby enhancing the infrared light using effect.