YO dude, maybe you can imagine that a closet shape space would have four corners, when I hear you asking how many CFL bulbs for cheapest then I have to point you to wallmart dude and if you can imagine that you put one plant in an easter pail size container maybe two three gallons or so, and you set one of those in the corner, then that one plant at a month old, can use two 42 watt bulbs above it, and two bulbs hung in front of the plant on the open side, considering that one side will be the back wall of the closet shape, the side wall with be the narrow side wall of the closet shape, and the third wall would be the front wall of the closet shape-- so that one plant can use 4 to 2 42 watt bulbs thats about 84 watts or 168 watts. You can run as CLONE DOME humidified tray with electrical heat mat next to it or maybe one or two of those in the light space next to your mother plant and you can stuff 20-72 clones in an ebay ordered NGW clone dome!