The website states the following:

"SilverStar's color temperature is a white hot 4,000 K, far higher than other halogens on the market and comparable to High Intensity Discharge headlights.

SilverStar shines with a luminance up to 20% greater than other halogens.

A sharp profile, silver tip, and amethyst blue coating create a dramatic, high-end, crisp, clean look."

Of course I can't find the price on them now... but if I recall correctly, they were just a few dollars more than standard halogen bulbs.

I'll do some more research.

__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)