This is a simple cover for the Innovative Marine AI Prime HD Led light for aquariums.
I did not make this, it was incredibly hard to find so I figured I'd share it here. Its available on thingiverse and was created by ludnix. I take zero credit for this. Just resharing it here. Please don't boost it or anything. Head to thingiverse and give ludnix the credit.

This basically just directs the LED Directly down into the tank instead of letting the light creep out the sides.
This is perfect for when your light blinds you because your couch is at the perfect level or something like that lol