Dendera Light

The "Dendera light" comprises three stone reliefs (one single and a double representation) in the Hathor temple at the Dendera Temple complex located in Egypt. The view of Egyptologists is that the relief is a mythological depiction of a djed pillar and a lotus flower, spawning a snake within, representing aspects of Egyptian mythology.
According to others, including some ancient alien theorists, the carvings suggest that ancient Egyptians used electric lighting to illuminate their tombs.