I'm by no means am authority, since I'm still adjusting my setup. I used a mirror tint from Home Depot on all four sides of my setup. Someone else on here used mirrored auto tint on theirs too. Sorry I can't remember who, I just remember reading it. When the light is on you can see everything beautifully, but when it's night night time you can't see inside at all unless you look in from the top making it kind of hard to monitor temps and humidity. I shine a flashlight inside and look through the glass if I want to see my gauges after dark though. It does make it look like I have a forest of plants too.
Just an outside of the box idea.
Good luck with whatever way you decide to go.
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