Got the lowdown from google...
X-Treme Power is basically Philips' HIR bulb.
Equivalent bulbs from other manufacturers are "Osram Hyper" and "Toshiba HIR".
That being said, X-Treme power should be significantly brighter than older, traditional designs like Osram Silverstars (what I have one one of my cars now). Will be shopping for Philips X-Treme Power or Osram Hypers soon.

No, but it was what sounded closest to Bill, bill. Ha ha ha!
EDSA Rehab/Rebuild and Guadalupe Bridge Repair