I just went through this, mainly because I wanted all of my lights the same colour (white) and not that nasty yellow tinge like the standard lights. I started with the cheap versions.... don't do it. No light beam pattern at all. In the end I bit the bullet and bought the Philips X-Treme Ultinon. I used them last night for the first time on the road and they are the best LED I've tried. I also tried the Philips racing vision, very good bulb but again, they had that yellow tinge.