I Have A 3'11 x 3'11 Space.. Lighting Ideas?

I'm bringing my outdoor plants in to flower and i bought a 3'11 x 3'11 homebox that is 6 ft tall. I'm hoping someone can tell me the best lighting for this space, i have enough plants to fill the area. They have been grown in 5 gallon buckets with soil. Should i use one 600 w hps/mh system or do i need 1000w? or do i need 2 400w hps lights? i need to buy it soon so any advice would be helpful! thanks with the help of the people on the site you've got me this far! haha thanks again

one 400w hps/mh will do and you'l need to get a load of organic pestacide for all those bugs you're gonna bring in with the outdoor soil (neem oil)

where did you get the homebox and for how much?

i'd go 600 watts.

A 600 watter would be good for a 4x4 space, It would give you about 5750 lumens per square foot or 37.5 watts per square foot. But if you are growing in 5 gallon buckets and only have 6 feet of height to work with you might have problems...