condition mean min max 4 h after light 5.635915 4.17699 7.09484 8 h after light 1.837045 1.79633 1.87776 12 h after light 2.81909 1.80036 3.83782 4 h after dark 12.31636 9.04682 15.5859 8 h after dark 9.164625000000001 8.98123 9.34802 12 h after dark 7.297745 6.33722 8.25827