Headlight Tech: Everything You Need to Know about HID Ballasts
HID Lighting Ballast: The Ultimate Guide
Can I use a relay in HID Xenon before the bulb to control it with the headlight wire, and a relay before the ballast to control the ballast with ACC wire? -
Which light bulbs need a ballast?
How Do You Know If It's the Bulb or Ballast When Your Car's Bulb Goes · Underground Lighting