light leak solution

I cut up an old mesh nfl jersey and wrapped them around the front and back of both PC fans in a grow box...light leaks are definately reduced but I'm worried about how much air not going threw.suggestions?vcomments??

fill it with those ugly ass color led's everyone like to use in their pc

make a light trap. get some cardboard and make a box that fits around the fan and cut out one side so that air can flow. put the cut out side facing down attach it over the fan and you will be good. it should look something like a dryer vent.