condition mean min max 4 h after light 499.670123 461.920592 537.419654 8 h after light 489.890581 454.422484 525.358678 12 h after light 593.5388459999999 542.466025 644.611667 4 h after dark 589.80898 583.155134 596.462826 8 h after dark 650.3796525 628.403729 672.355576 12 h after dark 680.451491 680.451491 680.451491