#light was used extensively in the world's fairs, which much of it appears to be extraordinary for it's time. Even forgetting the inconsistencies and impossibilities of the worlds fairs, light emitters were depicted much earlier and they just happen to look like what the worlds fairs presented later on. Considering we know that sound and vibration can emit light, it is not unreasonable to hypothesize that these old vibrating buildings could illuminate on their own. Many old world structures standing today look suspiciously like they can get turned on.