Hid Ballast POWER CONTROLLER HID is also known as a "high pressure gas discharge lamp", which usually consists of a high pressurepacket known as ballast,light bulb, etc. The "ballast" is a necessary accessory part in HiD. The mainfunction of the stabilizer is to momentarily increase the voltage from 12v to 23000v, and then use thisvoltage to activate the HlD bulb to generate very bright light between the two poles, thereby itmakes the brightness of the bulb higher.