The model I remixed this from is an excellent riser for those using the BLLED controller. That riser includes an “anti-glare” feature that works great if your printer is sitting on the ground, but in my situation, the LEDs would still shine in my eyes after installing my BLLED. I designed this model (4 pieces) to fit perfectly in the riser and block the LEDs from shining in your face without reducing the light into the chamber.

The images I've included show the before and after shot. The difference should be clear.

Print these in something that can tolerate the heat of your chamber. LEDs produce no heat, but your chamber will. I used PETG. These are also designed to fit pretty tightly to avoid light leakage.

I couldn't get these to attach well with super glue, so I used JB Weld clear which sets in 5 minutes and dries fully in one hour. It worked great.