This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/ja3dQ9PL2kU . I did not take a picture that does this justice, but as you can see, it is a simple shape that needs only about 15-20% infill for strength and the light will go through it if you've got a light PLA or ABS. I printed in white PLA. If your lights will get hot you need to obviously consider that in your plans. Mounting is only a matter of hot glue in my case, but you may wish to enhance the file in TinkerCad to get fancier mounts made.