condition mean min max 0 h after light 9.78327 9.12954 10.437 2 h after light 24.34805 23.0394 25.6567 4 h after light 25.25775 24.3811 26.1344 8 h after light 39.0939 36.2951 41.8927 12 h after light 54.8762 53.3117 56.4407 2 h after dark 36.02895 32.4656 39.5923 4 h after dark 32.8642 30.785 34.9434 8 h after dark 34.6725 34.1772 35.1678 12 h after dark 18.25855 17.9383 18.5788