This was one of the most fascinating articles I ever read, Keiva ! ( I subscribe to Smithsonian). I'm so glad you brought the link into the discussion. Even as a history buff I had assumed some figment of light in the night (torch, candle, or gas light in the cities, at least) for most of history. This article points out that streetlights of gas didn't make their appearance in urban areas until the late 18th Century! And traveling at night was such a hazard on horseback most folks waited for day, or sometimes a full moon. People, both tipsy and sober, were known to ride their horses right over cliffs in the treacherous darkness of the time! I recommend everybody click over and read this to experience something they may have never even considered ...true dark at night....during fairly recent civilized history. Thanks again, Keiva!