XenTec H4 (9003) 6000K HID Xenon Bulb (1 Pair, Ultra White color) 35W AC Autolizer HID Xenon replacement bulbs Will work with 35W AC HID Ballasts (sold separately) Will run for approx 2500 hours Produces 2 to 3 times as much light as a halogen lamp Plug-N-Play installation