This is my first grow i have just finished my room i have done as best i could with the money available.my room chosen is 900 mm deep 750mm wide and 1800 tall. In there i have a 5inch inline fan wiich provides exelent circulation and a 400 w hps bulb in a cooltube. It is decked out in what looks like is basically heavy duty tinfoil from hydro store. And a rhino carbon filter. How many plants would you all suggest putting in there for best yield. And also is the hps bulb good for vegging as the gentleman in the shop told me it would be, but i would like to hear your opinions. Thanks alot for answers people greatly appreciated. As i am a newbie. Also i should if said before how many dry oz can i expect to get out of this size room realisticly and how long from seed to harvest on average.