Great thread, I know the HPS/MH people laugh at clf's And if you are tyring to grow some tight bud with 6/45w cfls they are probally right most of the time. I have been looking at both. The high heat issue(I know cool tube) brings me back to cfls. I can get 14 200w 9250 lums cfls 7 6400k and 7 2700k for 406$. I think this is comparable to a 1000 w MH/MPS 421$ or at least close. I would like to hear some thoughts before I go one way or another