I'm fairly new to this also but I would say you need more light. I think the 150W MH is a good start with about 11,000 lumens. But it depends on the size of your area. How many square feet do you have? I think a 400W is good for 3x3 or 4x4. From what I have read you should have somewhere between at least 3000 to 5000 lumens per square foot. A cheap light meter helped me to understand how well your lights are really working. Check how much light you have at the tops of your plants and how much as you get closer. And keep them as close as possible without hurting them. Add some CFL's to your mix and it would help out, but they need to be close to the plants for best use. But your grow area looks really nice. Looks like you did a nice job with it.