I recently printed the ultralight housing uploaded by K4mi1, for my G203 mouse. With the honeycomb design of the shell, the RGB LED's were very bright. I designed this simple 'diffuser' that slides over the middle LED, and creates a softer light output from the LED's. It's very simple to install, just slightly bend the middle LED away from the housing, just enough so that the diffuser slides into place, over the LED. It should stay in place without any adhesive.

I used transparent PLA for this print for light diffusion, but I guess you could print it in any colour if you wanted to change the light output, or eliminate the majority of it.

This was printed, top side down without any supports, and used the stock magnetic bed of my Ender 3 Pro. It has a matte texture, which may have helped with the diffusion aspect of this part. It should only take around 10 minutes.

If you print this, please leave a comment as to how it worked out for your mouse, or any suggestions for improvements. Thanks!