Xenon HID Headlight Ballast 12V 35W 89030469 3D0909158 68019173AA 5408497 For Cadillac. Material: The xenon headlight ballast control unit is made of aluminum alloy, ensuring rapid heat dissipation, stable high-voltage output, and minimal interference. Main Functions: Cold start current does not exceed limits, improving the brightness and illumination distance of the headlights, thus enhancing nighttime driving safety. Easy Installation: Simply replace your old or damaged HID headlight ballast with our product, saving time and effort. Rigorously tested for long-term use. Note: Please verify the part number before purchasing to ensure compatibility., Manufacturer: HNCWSM