i would do 4 42W cfl's per plant in your situation.
Mate its all dependin on how you wanna grow your plants. If u want 1 big plant that will take up the whole space or 2-3 small-medium sized plants.
Need a bit more detail on how you wanna go about things.
Im a noob so maybe someone else here will be able to give u more insite on closet grows.
But id say 2-3 medium plants you should be fine.
I have some DP blueberry seeds now. This is a small type of plant with a short growing time. As a plan, I am thinking to live it about 35 days in vegetation(?) depending on how she'll be at that point and to do some topping and LST-ing to increase production.
So for any DP blueberry indoor - closet/ CFL growers out there, need assistance please
............................2How many plants can I grow in a closet of l=54cm on L=87cm and H=150 cm to the hanging bar? I know one for sure, but do you think I could grow a second one in there? (soil and under CFL lights)