HID is short for High Intensity Discharge. The so-called gas discharge is that within the UV-cut crystal quartz glass tubes filled with multiple chemical gases, mostly xenon and iodide and other inertia gases, the instant voltage from DC 12 voltage to 23, 000 volt is boosted by ballast, the xenon electron of the tubes is excited to ionize through the high-voltage vibration amplitude, and thus the light source between the two electrodes is generated. The super-strong white arc light generated by xenon can improve the color temperature, similar to sunlight in day time. HID power flow needed at work is 3.5 A , but its luminance is 3 times greater than that of the traditional halogen light bulbs, and its working life is 10 times longer.