The poster already made the plasma tube with the snaking plasma light, so the resemblance is there whether you want to see it or not. All the items depicted to be used by the Egyptians can be used in an electric circuit that is the point.
And Egyptian sarcophagus lids depicted a the person that was inside! Not a snake in a tube.
And if you watch the picture you provided carefully you see that the end of the tube is connected to a wire that loops back to a little man on a stone that holds the tube up, completing the circuit.
Post Edited (25-Apr-14 09:26)