I hear dubbz on that sliding glass, it gets old real quick.
Alotaball, You get 1200w with two 600w lights. The light penetration after 600w is also negligible, that is in comparison of the amount of energy vs. efficiency. I recently gave Steezz a book that describes this in detail, so I don't have it on hand to give a bunch of references. It basically says 2 lights are always better than 1 light. I believe many people confuse this quite often. Like in a game of 'Telephone', were you tell someone something, and by the time it gets back to you it is completely different. With heat and everything taken in, you can get the same penetration with a 600w because it can be closer to the canopy (unless you get one of those
Water Jackets). I unno, maybe Steezz can tell you, he has the book, haha. Going to look for some girls! Wish me luck!