These PIAA H11 Xtreme White Plus Bulbs are a fantastically bright and reliable bulb for your driving needs. They offer a Kelvin rating of an impressive 4000K which allows these bulbs to produce a fantastically intense white light. The superior performance and light qualiy will ensure that once you upgrade to PIAA H11 Xtreme White Plus bulbs, you will never want to go back to boring factory bulbs.