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Re:Rooms can be as bright as the outdoors by 2rsf on Friday November 29, 2019 @04:56AM (#21663342)
I live at 59.3 and dark curtains are not too common, most house I saw have some kind of shades or fluffy curtains, both don't block light

> they concluded the human clock was 25.1 hours

You keep quoting questionable or out dated research, the 25 hours figure seems to be wrong [0]

> Early research into circadian rhythms suggested that most people preferred a day closer to 25 hours when isolated from external stimuli like daylight and timekeeping. However, this research was faulty because it failed to shield the participants from artificial light

[0] https://en.wikipedia.org/wiki/Circadian_rhythm#Humans

Re:Rooms can be as bright as the outdoors by herf on Friday November 29, 2019 @06:05AM (#21663628)
Yes this is exactly what I said - it is only a cautionary tale for what we could do wrong, not basic biology.