Hi all....I'm new here but experienced grower and I have about the same size room/closet. I have a 4wx6dX8h foot closet, 400W HPS and 400W Sunlux for flowering. I have attempted to multiply the light by adding 6 large mirrors. It seems to have worked! I may/may not have 4 AK47s, (had 6, but 4 fill the closet to capacity) now in 1st week of flowering after about 90 days of veggin. They are about 4 foot in 2gal containers in MG soil. I have them staked and am trimming for a (hopeful!) mega yield (saw pics and desc from an Ed Rosenthal book) I won't be posting pics prolly, and I'm not exactly sure what defines a monster plant, but these are some thick bushy stinky babies...yes, I call a four footer a baby! They've been fed MG with every watering. Bottom line is they are very, very healthy, so get bz planting and good luck! The longer you think about it the bigger they coulda been!