The walls of the Temple of Hathor at Dendera Egypt, about 70 kilometers north of Luxor are a few strange objects display similar to the bulb. The fact that these scenes, dating from about the first century. BC, showing a container with the snake cult objects or bulbs at the beginning of the 21 interested century Austrian engineer Walter Garn. That according to these models denderských construct completely functional light bulb, which receives light through an electric discharge in the shape of a snake between its electrodes! We are moving to unravel the mystery, why are not interior of ancient Egyptian temples and pyramids očouzené soot? Even the German Jesuit scholar Athanasius Kircher (ca. 1601-1680) records information about finding the lamp still burning underground in Memphis, the former capital city of Egypt. Yet it is not clear where to find the Egyptians a powerful source of electrical power, as weak batteries to light up like light bulbs is definitely not enough.