The Xtreme white bulbs provide closest color yet to HID. Xtreme White Series of bulbs produce a cool white light output and a blue top coat on the bulbs adds a slight blue tint without loss of performance. The wedge bulbs can be used in a range of applications as turn signals, side marker lights, and parking lights. 19172 Features: XTreme White Wedge Bulb Twin Pack, 4000 Kelvin Color Temperature, Wide Range of Applications - Turn Signals, Side Marker Lights, Parking Lights, 5W Light Output, Cool White Light Output - Better Color Recognition & Contrast, Adds Blue Tint to Lamp Without Loss of Performance, Includes: 2 Bulbs"
I purchased several sets of PIAA extreme white bulbs of differing sizes, tried them, returned some to Amazon then purchased some of what I returned again. Why?PIAA, Hella, Sylvania etc. seem to market the non-HID or Xenon automotive bulb products primarily by wattage and light temperature (Kelvin). I do not normally find a lumen rating which I would prefer since my objective in upgrading bulbs is to see further or brighter. My 1991 BMW uses traditional halogen bulbs everywhere so I hoped for better-than-OEM..
These bulbs are pretty decent, like most people expressed in their reviews, I wished they were a little brighter but now that I've had a chance to look at it, I feel it's actually a lot classier than what I was originally wanting.The light is not obnoxious so it doesn't look like I'm some 16 year old who thought it would be awesome to blind everyone.The lights look exactly like the ones the new BMWs have, so it just looks like a nice upgrade you paid for at the dealer (which, I guess, classes it up a little..
Don't let the blue color of these bulbs fool you. They give bright white light without blue tint. If you order PIAA Intense White headlights, you have to get these as well. Other wise your stock parking lights wont match the color temperature of those PIAA headlights and will look odd.I also ordered another pair for my license plate lights as well and now I have bright white light all around the car. Looks much better then stock bulbs.