condition mean min max 4 h after light 14.32515 13.7231 14.9272 8 h after light 11.35985 10.9034 11.8163 12 h after light 9.728285 9.19447 10.2621 4 h after dark 11.994250000000001 10.6298 13.3587 8 h after dark 11.588750000000001 10.2615 12.916 12 h after dark 16.491149999999998 15.636 17.3463