Replaces all H4-style headlight bulbsUses stock reflector and bulb housingBuilt-in ballast with active heat-management fanOffers a super bright 2000 lumen LED output (versus standard H4 lumen output of 800-1200 lumens)Draws less than 1 amp compared to stock bulb at 5 ampsEasy do-it-yourself plug-and-play installation20,000 hour bulb lifeAdapters not included.