yeah kablam,
12/12 sounds good.. They will at least douple in heighth.. and that looks like it could fill your box to the top!!

nice pics.. thanks
Garden Knowm Reviewed by Garden Knowm on . First grow... pics Hey all! I finally did it. I built a grow box, got some clones, and now I am on my way to a small garden for myself and my wife. Here is a quick rundown of my setup. I got a 1x3x4' box. 3 fans: 2 high flow computer fans and 1 circulating air purifier fan. 3 plants in soil: 1 white widow, 1 sensi star, and 1 humboldt gold. I got the WW first so it is a bit bigger than the other two but I am going to start them all flowering at the same time. I got a 250 W HPS light along with 2 smaller compact Rating: 5