An L shaped tube with a 90¤ angle in the intake, painted black inside, will not let out light.
faithlessxxx Reviewed by faithlessxxx on . How do you manage to set fans in your grow box? (+) Hey, guyz! I've stick with my dilemma... I've got my box from carton (simple and free hehe)... would like to install 2 fans - one for intake and one for exhausting. The problem is that I will have to make holes in the box... But having those holes, plants will get some light when it must be darkness... and this often (if not always) leads to hermies :( The only solution for now is just turning fans off during "dark times" and cover holes with something. But it is boring and kinda abusing... Rating: 5