Quote Originally Posted by postmandave
5ftx5ftx7ft is an area of 25 cubic feet and a volume of 175 cubic feet .A 400 watt would not be suficient for an area of that size that works out at 16 watt per sft..
personally, i think this is a poor way to plan a grow; this sort of calculation doesn't make sense on a number of levels, to greatest being that the lights surely will be lower than the ceiling

the real question is simple and three-fold

1. how much electricity are you willing to use?
2. how much do you want to grow?
3. how well can you ventilate?


also, i'd highly reccommend cloning and having a seperate veg room