How many plants I could fit into my growroom?

[Lowryder1]

On the Jock - seems like you are asking if the strain will work. It is sativa dominant (a Nirvana f2 hybrid from Jack Herer and something else if I'm not mistaken), and not as well suited for low ceilings, however you can still do it as long as you train them properly. Just keep them LSTed and FIMed; force growth out to the sides as they reach the top of your overhead room.

Thanks for the tips. I'm planning now to put three jocks into the closet, 400w is enough or 600w would do better? What sized vent holes I should have to cool down the lamps?

Is it really possible for the plants to reach 1,6-2meters height with LST, doesn't it lower the plant? How long I should keep the plant in veg stage to get it to that size and when should I start FIM and LST?