condition mean min max 4 h after light 16.2014 15.1497 17.2531 8 h after light 12.8077 11.8936 13.7218 12 h after light 14.61945 13.7673 15.4716 4 h after dark 17.1658 15.9761 18.3555 8 h after dark 16.4521 15.9327 16.9715 12 h after dark 17.661450000000002 17.0451 18.2778