[quote author=eiching1 link=topic=62677.msg1074410#msg1074410 date=1163860235]
Please explain, so before I put them in I can decide to keep them or not.
[/quote]
I'll give it a shot.
Take two 55W halogen bulbs. Bulb 1 has clear glass, and bulb 2 is the same but covered with a "super-duper ultra-white" blue (or dichroic) film. Which bulb is brighter? Assume both lamps are attached to the same power supply @ 13.8V.
A. Bulb 1.
B. Bulb 2.
For extra credit:
C. Clear Silverstar bulb made by OSRAM Germany.
Hint: Which bulb type are the manufacturers forced to use in their new vehicles? What happens when you cover a light source with anything not perfectly clear?
In North America, for the brightest light, we're pretty much stuck with option A. Too bad we can't legally get option C. It's really tragic that too many desperate drivers try option B, mostly (I guess) due to false advertising.
EDIT: I just looked at
http://www.xtremewhite.com/ORD-Light~bulbs-PIAA-PIAA~Bulbs-no-23935-1-1-1-1.cfm
...and that page contains some of the worst marketing BS I've ever seen. "100W output from a 55W bulb" :lol:
...or this: "PIAA light bulbs manufactured with PIAA technologies save energy, provide less heat therefore lengthen the life of the car light bulbs."
Priceless.