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"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 b
by 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 agoWe 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 agoI 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 agoBut 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?