Balcony didn't have a recess for mounting on the body of the lighthouse so I added one.
Base had errors - fixed.
Had to print this model out at a smaller scale (0.5) as I have a small printer. The optics didn't print well with my printer at that scale so I simplified it to 2 files, an optics base and a lens.
Note that that there is no hole in the optics base for mounting a light.
Thanks to josemivaz for a nice model.