UPDATE
I painted the inside of the box flat white. I used spray paint so it looks a bit sloppy but ill buy a couple more cans this weekend and give it a nice finish. I also decided to get some weather strips to try and lightproof the box. That did NOT go as I planned. The strips dont stick very well to the finish of the wood the box is made from. Also light can be seen through them a little bit. So I am wondering, how light sensitive are cannabis plants? Will this tiny, tiny bit of light stress them? Or even worse, will it ruin the dark cycles during flowering? I will post pictures once it gets dark so I can take the pic with zero lights but the ones inside the box.