800 HID driving lamps utilize an unique multi-surface reflector computer designed and engineered specifically for Gas Discharge bulbs. The performance of PIAAs HID lamps far surpasses the conventional reflector designs of other performance lamp manufacturers HID systems. Other features include a black powder coated stamped steel housing, chrome plated trim ring, and hardened prism cut glass lens for the rigors of rally and off-road racing. Includes required ballast. Diameter... 7 13/16 and Depth... 6 1/2.