The bulb is an H-7........After I changed mine to the phillips Hi intensity blue ? I was advised by others to use the "Silverstar by sylvania. I also changed the right one at the same time as it's been noted that when one burns out ? The opposite is not far behind. So I cahnged both of them. I only bought the blue because that's all auto zone had. But it was 55watts and I needed lights.....LOL The brightness is the same as the stock ones IMO......