I can tell you how I would do it. I would cram as many as I could with out overcrowding them when they are at the maximum height of about 2 - 2 1/2 feet with 600's. others might say to go as high a 3 or more feet. I like em short if I can ( some plants don't like being short). I go 4 feet with 1000's. 600's are great cause it's right in the middle. actually puts out more light per watt than 1000's. Its tough to tell you how to grow them without knowing all the factors I mentioned in my last post. I personally don't give a shit about plant numbers but I'm a nut/idiot. LOL I can't with clear conscious tell you to do the same.