Id say about 6
If it weer me id do 3 maybe 4
To get some dank ass herv and healthy thryving plants
i have a 400w cooltube
but ill only grow 2 to overwelm the plans with all that light
Then again thats just me
Depends on what your really trying to do... You could be soging in solo cups, whats more important is how large you want the plants your growing to become.
I do 4 in a room that size with a 1K watt and I have great results.. I also only use 3 gallon pots and let them veg 3 to 4 weeks longer. in the end I get more off of less
i would do 5... 3 gallon containers vegged for about 2-4 weeks and then flipped. ... or grow monsters and tie them bitches to the wall... vertical bare bulb it..