Not used for illumination though - no light bulbs around back then.
Of course not lol. It only shows that they were aware of how to make them. But so did the Greeks and
Romans. Silk was an expensive and rare commodity. But the romans knew if a glass rod was rubbed in
silk it produced static. Not that they ever did anything with it,other than entertainin themselves.
Well I know that and you know that, but the article that you posted link for was called "Tomb Lighting" and describes the Baghdad battery. The article doesn't state the obvious fact that there were no light bulbs around to produce light from the batteries.