So I have 3 tents next to each other and duct running from one light to the next light to the next being run by a fan in one. Not the ideal setup but it works. This particular grow I am using a new substrate and haven't trained like I normally do so the plants are taller, the lights are higher and more light is bleeding through the ducts to the other tents. So I am wondering, do they make something that I can put at the end of the hood that would cut down on light? I could just through a black t-shirt in there and I am sure it would cut down like 40% but does anybody have any good ideas?