condition mean min max 4 h after light 1.82336 1.70886 1.93786 8 h after light 1.651185 1.32448 1.97789 12 h after light 1.1239645 0.966249 1.28168 4 h after dark 1.8038249999999998 1.28514 2.32251 8 h after dark 1.737425 1.5871 1.88775 12 h after dark 1.6391149999999999 1.40324 1.87499