just build some kind of "U" shaped duct around the holes.. kinda similiar to the trap drain you'll find under your kitchen sink... air can go around the U shape, but light will get traped in it as long as you don;t build it out of a highly reflective material
syde00 Reviewed by syde00 on . fan/ventilation question im kinda confused on the whole fan situation i was going 2 get a Vortex PowerFan but i dont get if i need 2 of them or if the other fan is a different type(one for blowing out air one for blowing or sucking in fresh air) .... if someone could please describe 2 be how it works i would appricate it greatly Rating: 5