The problem with that statement -- is its not just about power savings for everyone. Aesthetics go a long ways for most peoples purchase/planning -- and as much as I love T5's, they just don't have that same punch that halides do... The glimmer lines are really a huge selling point for most people.

The other option, of course, is LED's -- you get the glimmer effects, and a widely adjustable color range... but DIY isn't for everyone

-Justin