The Lurker
Member
10" is not a whole lot of vertical space, merc...its 4' tall x 2 1/2' wide x 1 1/2' deep.(exactly why im doing a scrog, lol) im pretty sure it ends up being 6 square ft. well i am going with the jh, but its going to be next grow, i have 3 unknown mothers right now. cloned off friends, parents, outdoor plants. we shall see how it goes.
Anything over 250W will burn the hell out of your plants with your clearance, and a 250's still gonna be hot/too intense even with a cool tube. I used to run a 150W in a 2' x 3' x 3.3' (see attached), had good airflow, and still used a tempered glass partition (or shield) between the light and the plants to allow the light within ~2-3" of the top canopy. You'll lose about 8% of the intensity from light going through the glass, but you can get 'em much closer, so you more than make up for it in 1/r^2 gains. And they won't burn...
My 150W system would pull a good ~5-6oz that way with NLxBB clones in a nice tight ScrOG (actual garden area was ~2.7 sq ft). With your small area, that'd work fine, too. 50w/sq ft is more a good rule of thumb with larger garden sizes (I've run those too), I've found.
Cheers,
-TL