on ebay you can get 250w self ballasted grow bulbs in 2700k or 6500k they are 8900lumens 1250w incandesont equivalent they are about $50 sounds like a good deal
but im going to go with the 2 105w cfls for the $50
also i just got 2 65w 2700k self ballast cfls for $15 at lowls 300w equivalnt