If you like blue you are fooled.
http://www.danielsternlighting.com/tech/bulbs/blue/blue.html
Today, there's little reason for higher wattage bulbs, as technology has produced bulbs 50%, 80%, even 90% brighter than standard halogens at the same wattage.
Look for Osram Silverstar, Osram Nightbreaker, Phillips Vision Plus, Phillips X-Treme Power
http://www.powerbulbs.com/
BTW, forget USA Silverstars and go for European Silverstars--short life coupled with "blue" is not what you need.