This bracket is designed to hold an individually addressable LED strip (such as the WS2812 family) in a plastic sleeve, using printed-in clips to retain the LED strip.
Each bracket segment is 166mm long, which is the exact length of 10 LEDs at 60 LED/m. Segments can be bolted together using #8-32 x 1/2" fasteners, and each segment has 3 bolt holes with nut pockets for #8 fasteners to mount the bracket to your enclosure. Print as many as you need for the length of LEDs that you have. Model is symmetrical and can mount in any orientation and bolt together.
I used this as part of my OctoPrint setup to hold LED status indicators (using the OctoPrint WS281x LED Status plugin).
Read more about the full OctoPrint + LED project on my blog.
The author hasn't provided the model origin yet.