600 Square Meters??????
if my calcs are right that is approx 6400 sq ft

Might need more light lol

297 grams from a 250 watt hps might be a little optomistic i think
moneyshotpb Reviewed by moneyshotpb on . PROJECT - H.I.G.H GRADE ! HEY EVERYONE, 1st grow indoor done 2 outside succesful would appreciate as much advise as possible ! please kept these factors into consideration when thinking about your comments - - i will submit plans of the bassment area which covers 600metre squared , the basement area contains eperate corridors / box rooms. This will be submitted when i know how to but im to stoned at the mo to work it out ! - firstly this must be as low key as possible, i.e electrical bills etc ! Rating: 5