HID lamp means High Intensity Discharge Lamp; It's lighted by xenon and metal halide in the emission tube under the power of 23,000 volts with electrons and metal atoms colliding with each other. The working principle is to change power voltage from 12V to 23,000V pulse voltage by power stabilizer, under the stimulation of electric arc between metal electrodes, xenon is quartz bulb give out very strong light. The color temperature is between 4200K-8000K and light is white with little blue. Its illumination principle is absolutely different from traditional tungsten filament bulb and is a revolutionary high-tech in vehicle illumination.