well Thanks bro. uhh, well, to be honest when I grew them I didnt have many reflective surfaces near the plants .so in a 2 or 3 foot squared tent with clean reflective surfaces ,those lights should do really really well. one thing to note as they tend to grow taller verses wider for some strains. so as long as you know they'll tend to go UP verses outward and you'll do excellent. White COB's are good. this CC-100W is also a really nice light. I have done four smaller ones under it actually. twoi two light in that tent I think it'll perform well. just buy a small clip fan for each blowing air down,and across the fins from above. its better imho. to smaller fans clipped to the string or cable holding them up gives better heat dispersion too imo. happy growing.