I have thought about cfls and t5s but my main thing is price and the t5s are nice but not enough lumens and intensity.I dont really care about the electic bill all i want are the bigest yields i can get and i have seen some cfl grow and they seem to look good.But then again most expert grower recommend hps for dense buds but again right know its about cost.The cheapest hps i found is a 150w floralux ,its aair cooled with glass lens and its about 129$ with the flanges.Or the other light i might get is the 250w batwing hps.These is just a standard light but im thinking about getting some tempered glass from my local hydroponics store and glueing it to a board and placing the board below the light.With the shelve right below the light that be almost like a big selled in reflector and ill have a pc fan sucking out the hot air out of that space.This light will only be an extra 10$ and the glass will be like 15-20$ but will the result realy be that much better than a 150w hps.