8-10 hours. Anything less than 7 and I get "brain fog." And my day is essentially ruined. Hard to be productive when your mind is mush. Cannot tell if I am th

8-10 hours. Anything less than 7 and I get "brain fog." And my day is essentially ruined. Hard to be productive when your mind is mush. Cannot tell if I am the strange exception or if only the exceptional cases (e.g. 5 hrs etc) are posting here. Kind of like asking people their height, only the people who are the extreme end of the spectrum give an answer and the whole thing looks warped.