Thanks for stopping in KP, I've seen your comments in quite a few posts and they are alway helpful. Your input is much appreciated. Closetgrower, thanks for your input as well. I was considering moving my lamps closer as well. These new flouro units seem like the way to go. However, for my purposes, I only have access to the 400w MH. This is a switchable ballast, and I do have a few HPS bulbs in the wing. How close would you recommend that I move it. Maybe to around 18 inches or so? I'm about 24" right now. Again, thanks for stopping by.