are your lights air cooled? the more exhaust the better. best case scenario, you want to be able to exchange the air in your room once every 1-2 minutes, but once ever 5 will suffice.

to figure out your cubic footage multiply length x width x height. the fans you are looking at are rated in CFMs or Cubic Feet per Minute. you do the math.

the two tens will be better than one 12.


-shake