Since there only 20 watt I would put as many as you can fit inside of the grow box.

Keep them close to the plants as well, no more then 3 inches above (CFLS & tube fluorescents only) for the flood light I would place it a foot above.

Do as demoreal mentions when flowering & add the flood to the cfls. The more light in this stage the better

Make sure you have a fan to circulate air & exhaust excess heat. A 12v computer fan works fine, but if you have something more powerful use it.

Air flow & temperature (between 65-75º F is best) are key players in growth development same as light schedule... which I learned the hard way. -->Possible Hermie<--