Thanks breaking that down. I've known all along I'll need at least two drivers. That's the reason running 10 or 12 @1050 seems most appealing. I can run two hlg-185h-c1050, or two hlg-240h-c1050 and be very close to, or at, the 1 Cob per sq ft number and do it all with roughly the same electricity (or even less, depending on 10 or 12) as 8 cxb's @1400. I'll try and get you some pics of my box. It's nothing special really. 4' wide, 3' deep, 3' wide door, Plywood construction from scrap in the garage, 6" hole in the top for the 6" Tjernlund Inline fan, insulated ducting to reduce the sound of the fan, all into a DIY carbon filter.
I'm actually going to be upgrading my box after I see a few runs under the LED's. Stepping up to a 6' wide X 4' deep area, and making a second identical bar to the one I'm making now. Hmm....with that in mind maybe I should only run 10 @1050ma. Two of those setups (total of 20 @1050ma) will pull just over 700w which isn't much more than I'm pulling now....wonder if the extra 142 watts in a 24 sq ft area would make that much difference in bud production.
Awesome. Thank you. When running a 250w driver, but the Cob's are only pulling 213w, is the pull at the wall closer to the drivers max of 250, or closer to the actual pull of the Cob's (213w).
Thanks for all the input everyone.