AndyBotwin
Weed Whisperer
I don't quite get how that black box works could you explain it a bit pleases lol
Here's a similar one with lots of pics. Basically you just want a box with holes on opposite ends and alternating walls inside the box. The air goes around the corners but the light can't. They can be custom made to any size opening and cost next to nothing:
https://www.icmag.com/ic/showthread.php?t=224159