31" square is 6.66 sq ft. A 315 in that space is more than enough, ~47w per sq ft.
The last of it is still drying, but I'll get almost 2 oz per sq ft using 37w per sq ft. & 12 week strains. Even 8 week strains should give similar yield at 47w per sq ft if everything else is solid.
The last of it is still drying, but I'll get almost 2 oz per sq ft using 37w per sq ft. & 12 week strains. Even 8 week strains should give similar yield at 47w per sq ft if everything else is solid.