parametric LED Diffusion & Mounting strip
thingiverse
Inspired heavily by https://www.thingiverse.com/thing:2731338 - but redesigned from scratch to fit IP65 waterproof LEDs: https://www.amazon.ca/gp/product/B01FFWQCKO 10.2mm inside width 2.5mm inside depth (with 2.5mm radius fillet) I found a "Diffusion thickness" of 0.4mm is about the minimum (2 layers), but gives almost no diffusion with white translucent filament. 1mm thickness gives a nice subtle diffusion (and cuts down and the harshness I included the .f3d file with parameters named so others can tweak to suit various styles.
With this file you will be able to print parametric LED Diffusion & Mounting strip 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 parametric LED Diffusion & Mounting strip.