The foot print on the Diablo description says it does 5x5 in flower, do you have more to that area or do you just use one half of the tent?My advice would be buy the best light or lights you can with your 800... After using the hlgs... I wouldn't touch anything else from that part of the world.... I run a 1.2 x 2.4 and would rather have half the tent empty and run quality lights in just 1.2 x 1.2 of it than Compromise. 3 x HLG 300l rspecs would work OK in that space but a bit more than 800... Buy right the first time, it will cost you less in the long term
I could buy a 1.5x1.5 if funds allow tho. What do you think?