condition mean min max 4 h after light 15.442515 14.090096 16.794934 8 h after light 13.3218075 12.665784 13.977831 12 h after light 14.2307415 14.191576 14.269907 4 h after dark 14.4325865 13.720212 15.144961 8 h after dark 15.975424499999999 13.629895 18.320954 12 h after dark 14.515109 14.515109 14.515109