I used 3 gallon and 5 gallon pots, but i found that going smaller was the trick. You get more feedings per grow cycle, it is easier to control any problems of Ph, nutrient deficiency and fast flushing. I grow a SOG in a 4x4 tent with 4 240 Blkstars using 1 gallon pots. Fast, quick and yields of...
My first led grow was with 2 blk star 240's, 3 white widow veg'd for 45 days and the yeid was 4.25 oz. My current grow is 10 plants with 4 240's, from seed and veg'd 28 days. They are now in week 5, I think I will yield around 1/2 to 3/4 oz per plant, maybe more if I am lucky.
I'm running 4 Blackstar 240's in a 4x4 tent. I have 4 white widow, 1 northern lights and 5 Aurora indicas. The 4 light spread is working very well for me. I have found that with Led lights, I needed to use more CalMag than I did using CFL's. They are in week 5 of flower.