The Xtreme-Vision +100 is the best H4 bulb I've ever used in my 99 Jeep Cherokee XJ.
There is a blue package version that says H4 (which is what I used before).
There is a red package version that says 9003.
The packages are slightly different prices when sold at the same website. For example CandlePower.com.
Also, CandlePower.com says the blue package H4 is for motorcycles, and the red package 9003 is for cars. What the heck? I'm confused because I thought H4 and 9003 were the same bulb? Is there a difference?
P.S. - I have tried the blue package Xtreme-Vision-Plus +130 bulbs and don't like them. I'm strictly a PXV+100 fan. However, I'm now confused about whether there is two versions of PXV+100.