nice scooby avatar

yes its ok to put tubing through the panda film, use duck tape to seal it up, white duck tape for inside, black for outside

if you are in a cab and you are using your fan for both fresh air in the cab and to suck all the hot air out of the light, then yes hook up the exhaust hose on 1 side of the light and keep it open on the other

if you are going outside to a furnace i would recommend using carbon filters to eliminate smell for security reasons