Good luck...but dude...you are going to run into space issue. That light could do so much more! They might seem fine at the beginning, but once flowering starts...watch out. You are either going to have to going for big Colas on each plant of cutting down your amount. Your might even run into mold issues if they are all smacking into each other.
In my opinion, that is too many going for that size space unless you wanna get crazy. Go for two and make them nice. Three you are way outta space.
Just my 2 cents....like my Pappy says "Growing Grass is like masturbating....there is a general idea, but everyone does it different"