condition mean min max 4 h after light 6.77688 6.03696 7.5168 8 h after light 5.577590000000001 5.49441 5.66077 12 h after light 4.98193 4.73983 5.22403 4 h after dark 6.348485 5.97519 6.72178 8 h after dark 7.193765 7.11972 7.26781 12 h after dark 7.098585 7.07896 7.11821