Here is a lighthouse-shaped LED lamp kit. It uses the flat, disc-shaped LED lights that are powered by a USB cord -- Diameter of 62mm (about 2.4 inches), up to a height of 8.5mm, with a cord diameter of 3.5mm. You can find examples of it on Amazon searching for "LED lamp kit".

You can alternate the color of the tower in the slicer, nothing fancy there (the main tower is in one piece).

I created/tried multiple light enclosures for the top, including two that are meant to work with translucent/clear filament, and one that is open and meant for a solid color (recommend white for highest reflectivity).

FreeCAD (v1.0) file is made available for remixes or whatever.

The proportion of the top lantern is off -- a bit too large. I may create some new ones that are sized more realistically, but for now, it's a balance between aesthetics and letting enough light out from the base.