air ciruclated hoods that vent outside the grow room, great investment probably the best one too. however ur grow room will only be as cool as the air going in. so u might need an a/c, my room hit 90 all summer as a high but now its cooling down so its only 80. and at night its 68 so do what u have to but 86F isnt too bad of a temp. for lights on. u def dont want to break 90F, like stated u might get some hermies.