I'm thinking about 200What's your budget?
Well I'm only really using up like 4x4 of that area... I only have one plant and I lst and scrog the shit out of her. Idk if that helpsSorry you won't find a good led for 200 that can do 6x6. If you do want cheap check out the go green LED's they are good for their price but you will need a few. Or check out the Mars hydros led lights.