Why Does Light Bother Us When We Sleep?

Hello and blessings,

This is a biological system that Hashem created in our brains, with the purpose of us sleeping at night and functioning during the day. Regarding the question of what the purpose of sleep is, see here:

https://www.hidabroot.org/he/question/73841

Scientific advancements have created artificial lights (electric light, computers, screens, etc.) that can interfere with our biological system and cause us to remain alert at night and function less effectively during the day. The recommended sleep time is 7-8 hours, as our Sages said.

It is interesting to note that in the morning blessings, we say a similar blessing about the biological mechanism that the Creator instilled in animals such as the rooster. It is the first blessing on the wonders of creation, and the distinction between day and night: "Who gives the rooster understanding to distinguish between day and night"!

With blessings,
Daniel Bles