EWWW PIAA,
I hate to be the messenger of truth, but if you look at reviews of PIAA bulbs, and I mean real reviews where people took light meters, and voltage meters to them you'd be shocked at how uh well Unbelievably Horrible, and worthless they are. There were a couple of really good reviews showing how bad the PIAA's were and why, one was on one of the Audi forums, among others. Their 55w=100w is nonsense, and really misleading. The bluish, purplish, color appears brighter due to those being high frequency colors, and humans perceive the Glare as brighter. How many companies can sell just about identical products, as completely different items? "Super Plasma GT-X" "Star White" "Xtreme White Plus." It's just a marketing Gimmick. As journalists say to be judgmental of products that have labels that give no real meaning, Like "Super Plasma GT-X." PIAA must have a 13 year old working in the name department. If you look at their website info on their HID bulbs they explain that you should upgrade to their 6400k, or 6600k "Super Cobalt" bulbs as factory hid is 3800k. Thats really pathetic on their part if they can't even list correct information. All factory hid bulbs are 4100k, or 4300k, not 3800k.