Black Sail
AFN Authorized Vendor
Is that Subcool from TGA seeds?
Interesting light you have, like the wattage. I'll soon have a 4sqft box with limited height (101cm) with a 175cfm extraction fan, one passive intake and one active intake with a 40mmx40mm high effect fan and I've been adviced two autocobs- Thing is that will be 110w and even though I know it is another day and another dawn these days compared to before with wattage etc 110w just doesn't sit right with me.
I plan to do high density SOG's btw so no option to center one light above one plant.
That's right! Subcool of TGA fame. Check out the pics on IG @tgagenetics2 and @subcoolsig.
No matter what light you use you won't get good yields with 110W over a 4' x 4'. If that were true people would've been hanging a 250W HPS over a 4' x 4' for the last 20 years. I'm assuming you want to pull your two pounds per tray out of this thing, and in order to do that you'll need at least 480W of high quality COBs. That would take two Cannons ($638, pre-order sale ends November 5th).
With The Cannon the only potential issue will be the height of your box. It shouldn't be a problem with SOG, but my heatsink is 22cm tall and you want at least 36cm between COB and canopy at full power. If you can cut holes in the top so the COB is flush with the ceiling and the heatsink sits on top of the box that would be perfect. If you cut a 90mm diameter circle out of the ceiling the face of the heatsink would seal off any light leaks and most importantly having them outside the box would be a huge advantage in keeping the temps low!
If you can't cut the box and keep the heatsinks on top (I really think that's the way to rock the fuck out of this box btw) you can just turn down the wattage a bit if your canopy gets too close to the COB. At 200 watts you can have The Cannon 30cm above your canopy, no problem. In that case it might be a good idea to supplement with an autocob or two, if your yields aren't quite where you want them.
Happy Growing!