"Slim" HID Kit by Kensun with Xenon Lights, H4 Low-Beam Xenon/High-Beam Halogen, 4300K - 2 Year Warranty Simple installation - Usually in 20 minutes or less (some vehicles may require a professional installation) Ballasts are 100% Water-proof, 100% Dust-proof, 100% Shock-proof Included in kit: 2 slim digital ballasts, 2 bulbs, Installation instructions, Smart aluminum carry-case Lo/Hi Halogen Bulb means the low beam is HID Xenon and the high beam is a regular halogen bulb. If you would like HID Xenon for high-beam also, you will need a Kensun Bi-Xenon Conversion Kit. Produces 2 to 3 times as much light as a halogen bulb