These modules are designed for use with this modular LED lamp base: https://www.thingiverse.com/thing:4321472

See here for stable download: https://thangs.com/mythangs/file/40998

Note that the sizes and relative positions of the stones have been modified for structural and aesthetic purposes.

Here are other modules that use the same LED base:

"Dendrite" https://www.thingiverse.com/thing:4340529
"Out After Dark" https://www.thingiverse.com/thing:4332088
"Among the Ruins" https://www.thingiverse.com/thing:4322049
"Penguins on Ice" https://www.thingiverse.com/thing:4321879
"Rabbits in Forest" https://www.thingiverse.com/thing:4321943