Has anyone ever used a 250w MH w/ a 150w HPS? I have a 3'x3' area and from what I've read, 400w is perfect for that space. I already have the 250w light and I'm just debating wheather or not I should get a small HPS lamp to put in there as well. A friend of mine recently told me that MH lights produce more crystals, just not as dense buds so mixing them was the way to go. I don't really know how reliable that is, but it sounds interesting.