[LikelyClueless]

Many studies claim the response people have to the manipulation of light intensity, color, and duration, does effect several aspects of the person. Sleep hygiene does seem to play a large role, but the sun is likely the largest contributor to the human body's roughly 24 hour circadian rhythm.

[JaceLightning]

Ironically it's the wavelengths at sunrise which have the greatest affect. If teenagers are sleeping in they don't get to see these:

> Researchers said the wavelengths at sunrise and sunset have the biggest impact to brain centers that regulate our circadian clock and our mood and alertness.

https://www.sciencedaily.com/releases/2020/02/200220141731.h...