Get up to 50% more light on the road, to make driving easier and safer, with the Ultra Xenon Headlamp Bulb. This H1 bulb is a direct replacement for a standard bulb, with no wiRing Auto changes needed. This makes it an easy upgrade for your vehicle. The bulb's light helps illuminate the road more effectively, makes your vehicle more visible to other road users and gives better reflections from road markings and signs giving you more reaction time. E marked and street legal.