Small standing lamps that take a cheap Chinese LED earring (available at sites like Wish and AliExpress). A few dabs of super glue and the top clicks right into the middle section. The bottom is intended to pop on/off to add/remove the earring.
Printing Notes: The sidewalls got very thin at the top due to the small size of the model. In some of my test prints, a few wall sections were never closed fully. I like the "ruined" look it added, but you can scale the whole model up slightly if you want to try and remove. Also, if you have issues getting the bottom to snap in, scale down to 98% and reprint just the bottom piece.
Note, in the painted pic the front lamp is the finished design. The back two were prototypes. Also, I have a few more styles of lamps for these earrings coming out shortly!
3D designer and printer who is into 28mm gaming, DnD in particular - producing and selling 3D models as EC3D. If you are looking for something specific that you can't find, feel free to shoot me a message and we'll see if it's something I can come up with.