I'm going to be weeding out the weak and only keep 4 to bring further in life. Actually ended up going to 3 CFL to keep heat down in my area. With the mylar all around and the lights only a few inches from the plants, they seem to get plunty of light and heat. Right now they are small enought to have gathered in a 1.5 sq.ft. I'm down to ten and will work 6 more out as days go by to get the healthiest ones.