condition mean min max 3 h after light 16.93413333333333 16.5639 17.5232 6 h after light 9.66229 8.3735 11.6298 9 h after light 8.226446666666666 6.8283 9.77479 12 h after light 13.886125 10.9971 21.6078 3 h after dark 13.7711 11.0941 15.2161 6 h after dark 19.212733333333336 17.0694 21.3912 9 h after dark 17.238899999999997 16.3849 17.9699 12 h after dark 15.279599999999999 14.1457 16.4135