I've been watching these for quite some time and really like the white light. Has anyone done this with their foglights as well? I think it would look strange with regular foglights and white regular lights. Also, what kind of life are you getting out of the white bulbs? I seem to remember some of the early knock-offs burning out rather quickly.
If you do a search on Google, you'll get a LOT of hits ("PIAA" or "PIAA driving lights" or "PIAA bulbs", etal). There are quite a few different types of "near HID" bulbs that PIAA makes.
www.PIAA.com - they (of course) state that their bulbs are legal in all 50 states. The Glossary section shows a nice wavelength/color chart (so you can picture what they mean by "plasma", "super", "xtreme", etc).
I paid about $52 and tax for this set at www.adventon.com (local for me). I'll admit that I didn't shop for prices on this set because I was already buying a pair of PIAA 540 driving lights from Adventon ($170 and some change).
Regarding legality issues, I don't foresee any problems* (YMMV!), even with HID, as long as your lights are properly adjusted. The bluer your lights are, however, the more subject to scrutiny they will be. I'm not a big fan of the blue/purple look and these 4150k lights are just what I like... Then again, I'm not really all that concerned with equipment violations...
* It will also depend upon the "vehicle code" in your state
I changed my fog lights with PIAA Extreme Whites, and I really like them. Technically, I don't think they do as well in the fog, but for regular night driving, I'm really happy with them over stock. The road is much more visible to me.
I'm about to put my PIAA Extreme Whites on tomorrow. How have yours performed so far. I understand there's a 1 yr warranty on them. I know I'm paying the extra bucks but it's quality I'm after. They're not too blue are they? And have you had any other drivers complain (flash you) because of the brightness?