HID is a new type of gas containing xenon headlamps, also known as high-intensity gas discharge lamps, the English referred to as HID (high intensity discharge lamp) Xenon lights broken filament Edison invented the principle, in the quartz tube filled with high-pressure inert gas Xenon-XENON replace the traditional tungsten filament, in the ends of electrodes are mercury and carbon compounds, to 23, 000 volts through the ballast current to stimulate the high-pressure xenon light poles formed in a perfect arc of white, the light is very close to perfect sunlight.