what would happen if you took autos 5 weeks from seed pop and 18 hours of light to 12 hours? i'm assuming you would just loose those hours of production. peace.
both those lights are underpowered for a 4x4 imo. will they work, sure but the edges will suffer. for a hundred more bucks check out the flora flex 700w. peace.
plant count if that matters to ya, just saying one pot means one plant (at least to me). if you live where the witch hunt still rides, lol. so do you let the roots fill the underneath of the bird bath? i imagen loose coco falls in but not much.
I think if you are using a pump your leg length does not need to be the same. I thought a "gravity" feed system needs legs the same length but not a pressurized one. Someone correct me if I'm wrong.