condition mean min max 4 h after light 8.5219275 7.994401 9.049454 8 h after light 8.641244499999999 8.400847 8.881642 12 h after light 7.3137229999999995 6.893365 7.734081 4 h after dark 8.400847 8.400847 8.400847 8 h after dark 8.3566965 7.835937 8.877456 12 h after dark 8.698127 8.698127 8.698127