The kindle 4 NT had some cases with built in lights. Mine fell apart but I couldn't find another one online. I decided to recreate the design and also add an adapter to use USB-C so it's compatible with modern cables.
I used M4 screws and nuts, wire, an LED (I salvaged mine from the OEM case), some felt and stretchy band. I printed the whole case in PLA but the “hinge” is in TPU.
The author marked this model as their own original creation.