Navigation Light Covers
thingiverse
The small-half needs supports but the others do not. The Arduino code can be found on GitHub https://github.com/awoehler/NavLight-Basic These are designed to cover 3MMx10MM WS2812B LEDs. They barely just cover the LED and provide wider viewing angle at the expense of a little brightness.
Download Model from thingiverse
With this file you will be able to print Navigation Light Covers with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Navigation Light Covers.