HID-Warehouse HID Xenon Replacement Bulbs - H10 / 9140 12000K - Purple (1 Pair) - 2 Year Warranty HID-Warehouse&reg HID Replacement Bulbs are compatible with 35W & 55W Ballast. Compatible with most aftermarket HID Kits (Please check bulb connectors to ensure they are the same) HID Replacement bulbs require HID Ballast to work. HID bulbs will not operate without a ballast. Compatible with both DC and AC HID Ballast 100% Plug and Play Installation. No Modification Required. 3X Brighter than Halogen Bulbs. Lasts 5X Longer. 35% Less Power Consumption HID-Warehouse&reg Bulbs includes: (2) HID Xenon Replacement Bulbs (2) Plug and Play Wiring Harness 2 Year Hassle Free Warranty - Live Tech Support via Phone & E-Mail