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.