condition mean min max 0 h after light 10.30694 9.62898 10.9849 4 h after light 9.61262 8.39464 10.8306 8 h after light 8.92833 6.98876 10.8679 4 h after dark 14.1894 13.4858 14.893 8 h after dark 15.620449999999998 14.8759 16.365 12 h after dark 8.823675 8.04843 9.59892