H4 Base. Hi/Lo beam. Up to 3600 Lumen output. The bulb fits H4 female socket. The headlamp has both a low beam and a high beam. Available color White 6000-6500 Kelvin. Long life up to 30,000 hours. Fits HID Xenon bulb style M5S. Comes with several adapters to ensure correct fit. Comparable to a 300 watt incandescent light bulb. Long warranty please see warranty information on the detail page. Great for vehicles, trucks, ATV all terrain vehicles, motorcycles and scooters. Since led lights are solid state you do not have to worry about bulb failure due to broken filament or broken glass. The decay rate for leds are much better than xenon, hid or incandescent bulbs. Designed for head lamps with 12V system. Package comes with one head light bulb per package.