I am surprised there haven't been more negative thoughts on these bulbs posted here. They sure aren't very popular :naughty:
I have tried a few different bulbs on my truck, I started with some popular Japanese brand that I can't remember right now. They were higher wattage bulbs, made for "off road use only." They didn't last long, so I went with MTEC's at stock wattage, and while they did last, the shape of my beam was terrible, all scattered. (I didn't even realize that could happen, I thought it was a function of the reflector)
So, now I have Silverstars in it, the beam shape is as good as stock, and the light is certainly whiter. But after reading about them here and checking Daniel Stern's site, I have decided once these go I will just go back to stock.
I would suggest putting the money towards some good driving/fog lights instead, if you have room for them. Maybe behind your grill even? I have a set of Hella Micro FF, and I like them. Others may disagree with my choice.
http://www.amazon.com/dp/B0002M9RHS/?tag=cpf0b6-20
On my motorcycle I have installed a cheapie set of autozone projector lamps and on dark highways, they really help out as well. I had put a 55/100 watt bulb in it, and instead of wiring to a relay I went through the stock switch and melted it. That was an expensive lesson.
Speaking of which, I have been told before that a good cheap upgrade for your headlights is to run them off a relay with a heavy gauge wire as short as possible. Straight off the battery, with only an inline fuse to protect them. You lose all the stock resistance in the factory harness and switch, they are "free" lumens.