I converted a "Solar Garden Light" from Harbor Freight (One Stop Gardens - Item#60561) into a light that hangs on a toilet bowl and illuminates it for night use.

Designed mostly as a gag, but other vendors are making big bucks on this, so if you have a spare broken solar light kit (where the electronics are still good, or you are kibbling several together). I have a somewhat dark bathroom during the day, so I don't get a great charge, and I have no idea how long a regular AA battery will last, but that's not recommended unless you don't add the solar panel, and then the circuit won't turn off during daylight.

I used translucent filament for the "span", and GITD for box and cover. The logo doesn't seem to slice very well.