HID (High Intensity Discharge) refers to lighting technology that relies on an electrical charge to ignite xenon gas contained in a sealed bulb.
A normal halogen bulb uses a filament which can burn out in as little as 200 hours.
HID bulbs are gas filled capsules that are rated for a lifespan of nearly 4,500 hours.
HID bulbs also shine much brighter due to this technology.
Unlike halogen bulbs, HID's emit a type of light that closely resembles natural daylight and is therefore easier on human eyes.