ive looked into getting a window unit and everything but in a 3x3 im willing to flower 3 plants and have room for a small ac inside if itll help keep a better enviroment for the plants, im not really too sure but i guess a window unit could keep the room cool enough for them, would it be better for me to run 2 400 watt hps/mh lights or a 600 watt, or something different?