This is a custom base I created for the moon lamp.
https://makerworld.com/en/models/31191#profileId-27822
I wanted an alternative to the Bambu LED Lamp kit and found that LED candelabra socket/cords are very inexpensive and work well for this use case. I used the socket below for my model, but I believe most candelabra/E12 socket sets will also work. The photo shows the moon lamp lit with a 50 lumen LED bulb.
https://www.amazon.com/gp/product/B0BHNJ572J/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
This could be use for any lithophane sphere so long as the base radius is 31.5mm - 36mm