Is it so hard to believe that different people work differently?
So the nuance is what's your tipping point where you are performing worse due to fatigue.
When I was a kid, my parents made me go to bed around 9pm. I used to get up every half hour saying "mom, dad, I can't sleep". They figured out quickly enough that sending me to bed early was a waste of time since I would spend 3 hours sitting or laying in my bed waiting, fully awake, feeling like going playing outside.
Does sunshine get brighter or darker as the day goes on? Could it get brighter, then darker?
Do you get closer to work during the day, or farther? You're at home at the end of the day- does this mean you never go towards your workplace?
Work through this with me.