real easy 600 will cover a 3.5x3.5 area for good lumen per sqft output. so how many containers will fit in 16sqft. that depends on the containers youll be budding in ..or if not soil , youll be able to fit more in a hydro system.. say your using 5 gal buckes..those take up a sqft of space..just with the bucket..and you need a lil breathing room ...so id say 10 under a 600 in a 5 gal bucket..put in 1 gal containers it could be double..all depends..this should give u a rough idea