HID is High intensity Discharge high-pressure gas discharge lamp abbreviation, can be called heavy metal lamp or xenon lamp. It is the principle of anti-ultraviolet UV-cut crystal quartz glass tube filled with a variety of chemical gases, most of which is Xenon (Xenon) with iodide and other inert gases, and then through the turbocharger (Ballast) the car 12 volt DC voltage on the instant boost to 23,000 volts of current through the high amplitude excitation of xenon gas inside the quartz tube electronics free, light between the two electrodes, which is called the gas discharge. Generated by the xenon arc light super white, light color temperature can increase the value, similar to the day of the sun light, HID work only when the amount of current required to 3.5A, the traditional halogen lamp brightness is three times longer life than conventional halogen bulb 10 times longer.