the sun is closest to the earth during the northern hemishperers winter so think about that too.
Dude, thats going to work great. Walmart also carries 42w cfls that are 2600 lumens each. And you can always get those 150 cfl's out of catalogs or on the net that are like 10,000 lumens each. Theres no need to spend 100s on a first grow. I think you will be very very suprised at what you can grow for a few bucks!