so today i hung black and white polly to lightproof my closet door. i cut two holes, one for exhaust and one for intake. i now notice that the ducting is not completyly lightproof. i was wondering what other people have done to keep good air flow and block the light?
this might be a cheap solution: grab a large cardboard box, on one of the sides cut a whole the size of the exhaust fan and attach to the fan... a cardboard elbow.