1. HID kit

4. Ballasts
Ballasts connect the HID bulb to the power source. One end
will be attached to the bulb while the female port will be
where the power will be connected.
Bulbs
HID bulbs are those that create light by passing a current
through a gas, usually Xenon, to produce a blue-white light.
The light from an HID bulb is closer to natural daylight than
what is produces from halogen bulbs.
These important components comprise a standard HID kit.