condition mean min max 0 h after light 68.7671 68.6232 68.911 4 h after light 27.9024 25.897 29.9078 8 h after light 19.611 18.2221 20.9999 4 h after dark 26.70785 22.7249 30.6908 8 h after dark 33.34845 32.9637 33.7332 12 h after dark 47.90035 39.5651 56.2356