H4 bulbs are 2-filament automotive halogens used for high/low beams. H4 was the world's first dual filament halogen automotive bulb, and is sometimes referred to as HB2 or 9003. H4 bulbs typically have a 55/60W draw, however higher wattage high performance upgrade bulbs are available. Looking for a bright blue H4 bulb? Check out the Luminics Krypton Pure Blue H4
bulbs. If you want to stick with something a little more street legal we have the Hella High Performance Xenon Blue H4 bulbs
and the PIAA Intense White H4 bulbs
, both are 50-state DOT legal in the USA. BuyHeadlightBulbs.com has one of the largest selections of automotive H4 bulbs, 9003 bulbs and HB2 bulbs. Our collection includes the highest quality H4 bulbs available at unbeatable prices.