Venting/Cooling

So im wondering about venting i might need.....im thinking of doing a closet system....ebb and flow...with a 400w halied. the space is about 2' deep 8'tall and 9 or 10' wide...the measuments are just rough but i would want to fill the room...so it might take two lights...

so i guess what im asking is what sort of venting would i need for one light and also two.

Got cash? go to the hydro store and buy a can fan. Cut a hole in the ceiling and vent into the attic. Do something for the odor.

Yeah i was going to build a carbon scrubber......i for got to mention that im in an app.....guess that means cut a hole in the door??? anyother place to get the right size fan?