Just a base for the 5 in moon lamp with the hole in the bottom.
Currently printing, so no guarantees about whether it will work (or I'll even be able to assemble it, the fit inside for the encoder board will be awfully narrow...).
The base is supposed to take an Arduino Nano as light controller (and power supply), a rotary encoder (ky-040 type) to control the software on the nano and a 12-LED neopixel (or other WS2812B) ring on those four standoffs. In theory, the upper surface of the LEDs should then be flush with the upper surface of the mounting ring inside the moon...
The sketch for the Arduino can be found at https://github.com/markus-i/colour-light - be aware that this is the version for https://www.thingiverse.com/thing:3270909 . If you want to use it for the moon lamp with one LED ring, you'll have to adapt the LED settings and initialization.
I'm currently printing in PETG, 0.1 mm, with the attempt to use supports everywhere (those cutouts would be hard to bridge otherwise). Guessing from my other attempt of adding an Arduino bracket, some rework on both the printed thing as well as the PCBs might be necessary.