Right at the start of this list, we looked at what seemed to be an ancient battery that had been found near Baghdad in Iraq. If our ancient ancestors really did have batteries, could they have been used to power bulbs of the kind we can see in this carving?
The carving was found below the Temple of Hathor, which is in Dendera, Egypt. The standing figures certainly appear to be holding enormous bulbs; they even have wires trailing away from them. They're either that or surfboards!