condition mean min max 4 h after light 11.6227995 11.288353 11.957246 8 h after light 11.1627965 10.805063 11.52053 12 h after light 10.8802855 10.40879 11.351781 4 h after dark 10.5938485 10.382634 10.805063 8 h after dark 9.9370165 9.884835 9.989198 12 h after dark 8.998757 8.998757 8.998757