Ello jackforest, glad to hear i have influenced you.It seems i have messed up a bit, i thought the thread i was looking at was love2chief's thread but it was actually yours.....oops.. sorry, So it was your rubbermaid i was looking at, so love2chief disregard that last post by me.So jack... you gotta make some sort of shroud for that exhaust fan, i used thick black cardboard paper and made a little shroud for my fan so the air will direct out but not let the light in, have the airflow pointed towards the ground.Keep in mind i keep mine in the closet where it is already fairly dark.As for the passive intake tube, i use dryer vent hose, and if you use the white kind like i did, you can put a heavy dark sock with the toes cut off over the intake tube to prevent light getting in. Anything else i can help with let me know, good luck