O-NEX BI-Xenon H4 9003 HID Bulbs 35W AC Dual Beam Hi/Lo H/L Headlight Replacement 8000K Iceberg Blue Super bright 3500 lumen produces up to 3x brighter than halogen, improve visibility, up to 5000-hour life expectancy. Dual Beam Function Bi-Xenon HID bulb which has both high beam and low Beam in one bulb. Bi-xenon bulbs require a special relay that controls the low/high beam movement of the bulb; and same as other HID bulb, it needs HID ballast to work with. These item are NOT INCLUDED. Simple Plug and Play installation, usually takes 20 minutes or less (some cars may require modification or professional installation). Cross Reference Number: H4, 9003, 9003EB, 9003XV, 9003CB, 9003SU, 9003ST, HB2; used for the HID Kit headlight Bulb replacement, please DOUBLE CHECK with owner's Manual.