condition mean min max 4 h after light 12.00885 10.8542 13.1635 8 h after light 11.81495 10.8705 12.7594 12 h after light 14.750800000000002 13.2763 16.2253 4 h after dark 20.7968 18.3853 23.2083 8 h after dark 17.63545 16.0613 19.2096 12 h after dark 17.38655 16.4674 18.3057