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Campfires, candles, torches...?

• minikites 12y ago
  ...are all much dimmer: https://www.youtube.com/watch?v=v0ES9TKAf_4 https://www.youtube.com/watch?v=v0ES9TKAf_4
  • ekianjo 12y ago
    who cares how dim they are, they enabled Humans to be active at night and therefore disrupted that day-light body cycle. Which is what the comment was about.
    • minikites 12y ago
      You said "being exposed to bright light late at night is nothing new" which is demonstrably false.
      • ekianjo 12y ago
        No, a petrol lamp was bright enough to read at night and study way longer than what the sunlight could bring you. I'm not sure what you are trying to argue with - do you think modern society just started 120 years ago only?
        • minikites 12y ago
          "Bright enough to read" and "bright light" are very different, that's been my point since the first comment. We've had "bright enough to read" for a long time but only in the last 120 years has it been possible to have actual "bright light" late at night.
          • ekianjo 12y ago
            We are not arguing about the same thing then ? My comment was specifically about the fact the day-light cycle had been disrupted for a very long time in human existence already. Not matter if lights were dim, using a petrol light after dark is already disrupting that cycle. Or do you contest that?
            • minikites 12y ago
              I am, because if a dim petrol light disrupted our sleep cycle, we would have seen sleep cycle changes sooner than 120 years ago. Instead they're correlated with the spread of electric light.
              • ekianjo 12y ago
                But there's ample data in literature about people doing stuff at night even back in the Middle Ages. So now, explain me - if people were sleeping later at night instead of sleeping as soon as the sun goes down, how did that no impact their sleep cycles?