Taochis HID Xenon Replacement Bulbs All Sizes and Colors H7 5000K x1 pair-1 Year Warranty 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 Taochis Replacement Bulbs includes,1 Pair Taochis 35W HID Xenon Bulbs with Plug and Play Wiring Harness;1 x HID Conversion Kits Installation User Manual. 1 Year Hassle Free Warranty - Live Tech Support via Phone & E-Mail