If you want to flower 20 plants at the same time, you will need a lot more than 2x400W lights. Flower under that combo with 20 plants, and you'll yield as much as you should have growing 3 or 4 under a 400W. If I were you, I'd get 2x1000W for that number of of flowering plants, at the minimum. For your clones/veg/mothers, invest in some CFLs, much cheaper than MH and when used correctly, will keep your youngn's very short and stout.

Also, I'd lay off the nutes for another week, they're still too young for that. It's probably why the leaves are curling. Good luck!
Comatose Reviewed by Comatose on . WATERFARM/ BLUE MOON ROCKS & PAPAYA Hello, once again everyone. I have something else that I'm interested in. BOG's Blue Moon Rocks and Nirvana's Papaya are my two latest projects. I want to start a mom of each strain (Veg/Clone Room). Afterwards I want to create a flower room for clones. Not sure which hydro style I want to use (DWC, Flood & Drain, Aeroponics, etc.). I would like to have two seperate tables (Early Flower and Late/Harvest Flower). I'm thinking about using 2-400 HPS or 1-600 HPS, but I'm not sure. Any Rating: 5