condition mean min max 3 h after light 37.2268 31.8002 41.6098 6 h after light 34.2468 26.6509 40.5052 9 h after light 40.382466666666666 34.2036 48.5014 12 h after light 42.14005 33.8001 52.2306 3 h after dark 56.336166666666664 55.0514 57.6605 6 h after dark 60.3178 58.0839 63.6526 9 h after dark 50.77576666666667 45.1993 55.9486 12 h after dark 46.6934 46.5242 46.8626