condition mean min max 4 h after light 16.836699 16.218377 17.455021 8 h after light 16.862543000000002 16.218377 17.506709 12 h after light 17.5681695 16.218377 18.917962 4 h after dark 14.3177015 11.185437 17.449966 8 h after dark 15.4911175 14.564322 16.417913 12 h after dark 16.449591 16.449591 16.449591