Adjure H4 Clear 55/60W Xenon Filled Halogen Headlight Bulb This bulb is filled with XENON gas that makes the bulb run cooler than a standard bulb which is a perfect match for the Adjure Headlight Lamps Recommended replacements for Adjure headlight to avoid discoloration to your lamp and headlight reflector The bulb maintains a super bright light same color as the halogen that is brighter than a standard bulb