Sleeping in the dark makes me angry the next day

[Starchless]

Is it because of melatonin? If I stay in the dark for a long time before falling asleep, I wake up very angry and low mood the next day. But if I sleep as soon as the lights are off I feel ok the next day.

What is the explanation for this?

 

[Rinse & rePeat]

“All of the stress-related hormones increase during the night. One of the ways these hormones of darkness act is to increase the sensitivity to light, in a process that is an important adaptation for organisms in dim light. In the night, our ability to see (and respond to) dim light is increased. But dark-adapted eyes are very sensitive to injury by bright light. Light that ordinarily wouldn't harm the eyes, will do serious damage when the eyes are dark adapted." -Ray Peat