Any sufficiently advanced technology is indistinguishable from magic. - Arthur C. Clarke LEDs were absolutely supernatural. As I said, go back in time with on

Any sufficiently advanced technology is indistinguishable from magic. - Arthur C. Clarke LEDs were absolutely supernatural. As I said, go back in time with one and show it to Medieval serfs and see what they say. Supernatural is anything that you can't explain given your understanding of the universe.