Also, just to be clear, for cars equipped with factory xenon headlights, our headlights are "bi xenon" meaning that both low beam and high beams are xenon. These are located in the outer housings (the housings closest to the wheels). However, our cars use halogens for the inner housings (closer to the grille of the hood) for daylight running lights (DRLs) and for flash to pass (i.e. when you pull the turn signal stalk toward you). Hope that helps settle any lingering questions, if you even had them.