I thought about drilling a couple six inch holes at the bottom of the grow room wall, and building a sub floor to cover them. Then, cut some air paths in the floor beams, and just cut like one 8" hole in the floor itself where the air would be sucked up. This would eliminate the light, but I'm not sure how practical it would be. It would also make for a nice place to hide my stash. At first I was thinking the floor would be raised 12", but I think 10" would be a better choice, as my room is only six' tall at its lowest point.
Then I thought about using PVC U joints, but I don't know?
What's the best way to light proof intake holes