High Intensity Discharge (HID) is a new type of lighting technology that replaces the old halogen
gas bulbs that use a heated tungsten filament. Unlike Halogen lamps, High-Intensity-Discharge
7(HID) lamps do not generate light by heating a tungsten filament inside a capsule filled with
halogen gas ( the gas helps prevent blackening of the capsule as the filament slowly burns out).
HID lamps operate more like vapor-filled street lights.

They don't have a filament but create light by zapping an arc between two electrodes.
That arc excites a different kind of gas usually Xenon, which in turn ignites metallic salts.
The light produced by an HID Xenon lighting system is greater than a standard halogen bulb
and with less power consumption. On the road, HID Xenon lighting systems appear as a bright
white beam which resembles natural daylight. The bright white beam offers greater visibility
and road safety.

1)More Light Output

2)Whiter Light and Greater Driver comfort

3)A Variety of HID Light Color Look