Viewport Light

This is a ring light for vacuum viewports. Mount a strip of LEDs into the inside and the white will reflect most of the light in towards the viewport.

I modified the design to be printed in two colors (no dual extrusion necessary)

Use a slicer like Prusa Slicer and create a stop so you can print the first 2mm in a dark color like black and then print the rest of the layers in a light color like white that will aid in reflecting light into the viewport

Also note that this viewport light also can work when it is placed on top of the viewport seal bolts.