Dendara Light bulb.
So how do I know that they had lights that don't turn off? I read a story of a group of Navy Seals that found Atlantis during the Bay of Pigs operation, and they were sent to clean up the underwater city to prevent the Russians from getting any Tech. What they picked up is stored away in a warehouse. Probably 'Warehouse 23.'
I listened to a radio show about Lights that don't turn off in New Zealand. I listened to engineers talking about the Great Pyramids how they had electric lights in them, 3000 years before they were invented.
I did not answer your question because I thought I had answered it previously.