i have a homebox xl, the specs on it is 4x4x6'7. i am looking at two reflectors the yield master 2 or a cool tube. does anyone have any experience withthese? it will be a 600watt. i was told all i will need is a can/carbon fan filter combo? is this true? will this get rid of hot air and rotate in fresh air?? what will be the easiest way to do this? will it keep my temps down? could i just get away with cooling my light and elimanting the smell, by just throwing in two regula fans?