With the addition of a third light I had to upgrade the fan setup as the 3 lights was a bit too warm for the space(space is 54" long, X34 high X20deep and the lights are X2 Galaxyhydro 140wdraw and X1 Mars 180wdraw). I bought a 6" axial fan and it keeps it nice at 80-83. Complete pics of setup in the link in my signature