High, doing my grow in the almost same way, Iam using a 45 gallon rubbermaid tub with 400 watts of fluoro's, for pots Iam using rubbermaid totes thing there like the things you would wash up in if camping or wash dishes in while camping, etc. there 6 inches deep 14 inches width and 23inches in length. I rectangle shaped (not round or squared) I drilled holes for drainage also drilled holes on the lip around the edge and screwed in some screws which are the anchors for when I tied the plants branches down. The plants all took the shape of the rubbermaids rectangle shape with level canopy which is important with fluoro's. Iam going into 5 weeks flower with 17 top buds on each plant so 24 top buds in all the size of my thumb 1-2 inches from the fluoro's. 2 plants that have been "LST'd" and pruned and the height is of them is 7 inches tall with frosty buds, so yes you can flower in them you have to do alot of bending of branches and tieing to secure. I have a 50 cfm computer fan on top of my lid exhausting and 2 small computer fans connected to pvc pipe pumping the fresh air in. I cut 3 holes at the bottom side of the 45 gal. tub and conncted 3 pvc 90 degree bends with the insides painted black, my computer fans are connnected to the pvc from inside the box. Inside the box was painted flat white so no dealing with taping mylar or foil, yield well I never weigh my stuff but last grow I only had 1 plant in there and got 2 oz.( estimate guess) with 300 watts of fluoro's, well over 50 watts a sq. foot. Make sure you use warm whites for flower. good luck and keep 1-2 inside the box and be smoking some your own while the outside ones take the summer to finish.