HID Bi-Xenon HI/LOW Bulb, Crystal glass material, low beam & high beam is on one bulb and 4-5 times brighter than halogen.H4 Bulb Size, Our bulb meets OEM size specifications to ensure a perfect fit, Plug & Play. Waterproof and vibration resistant.Color Temperature Available 3000K/4300K/5000K/6000K/8000K/10000K/12000K, Corresponding color Golden yellow/Yellow white/Pure white/Deep white/Light blue/Crystal blue/Deep blue. Upgraded for Car, Truck, SUV, etc. for replacing halogen lamps, all in one style, no extra driver needed. Slim ballasts use smaller internal components, waterproof, anti-shock and energy saving, easier to mount, and more stable.