Any advice. I'm sick of going in circles in my head. Veg room is 5ft h x 5ft w x 5ft long. Light is above the ceiling (plants can grow to pretty close to the max 5ft ceiling). 400w MH. Considering getting a 600 here as well, but they seem to really perform well under the 400, especially with just vegging. In the process of finishing flower room. Size 5ft h x 5.5ft w x 10ft long. Same thing with lights, recessed into ceiling. Full ventilation available from air cooled hoods. How to best utilize that space? I'm thinking 15-18 flowering plants at any given time in 5 gal buckets, 3 wide, 6 rows. Leaves about a foot or so on each side of plant "aisle" for access. Also, I'm thinking 3 lights in that room for full coverage. I will have powerful fans. Venting is expected and won't be a problem. Given this information, would you guys go with 1000w or 600w lights? I so hate to see neglected buds on the outside edges, but who doesn't? Will it be worthwhile to go with 1000? So many say 600 is more efficient, but what I want is the BIGGEST, and most potent results I can create, given my limited space. 1000 or 600?