I have made a support for this awesome moon: https://www.thingiverse.com/thing:2531838, made by Brandonzhun
Thanks Brandonzhun for share your work! It's amazing!
The base fits perfectly to the base of the moon, it remains fixed and is easily removable .
you will need a switch like this:
Three standard leds and a 3v battery.
you can connect the 3 leds directly to a battery without any resistor. If you prefere, you can add a 100 ohm resistor between leds and battery +.