That doesn't work out so neatly for people affected by the sun's cycle. The sun affects not just when people prefer to sleep, but also quality of sleep, durati

That doesn't work out so neatly for people affected by the sun's cycle. The sun affects not just when people prefer to sleep, but also quality of sleep, duration, how refreshed they are, and during the daytime the profile of energy levels, hormones, brain function through the day. Just going to bed earlier doesn't compensate for that.