right now, this is my current setup. it uses a 150w hps, and 2 42w 6500's: i want to add a pane of temperd glass where the step is, about 4 inches from the top(it used to be a pull-out drawer), so i can add another 150w'er(i got a deal, picking up 8x150w hps for $100). i will reverse one fan to have an intake, and exhaust for the lights, and add another 120mm fan for the grow chamber. i do have passive intakes. my goal is to have the lights sealed off from the chamber, to reduce heat, therefore letting me add more wattage to my current setup. or should i just keep what i have and call it a day?