condition mean min max 0 h after light 16.829549999999998 16.4451 17.214 4 h after light 13.01875 12.6484 13.3891 8 h after light 16.0717 15.3043 16.8391 4 h after dark 20.17785 18.4413 21.9144 8 h after dark 17.98475 17.6862 18.2833 12 h after dark 16.8522 16.6008 17.1036