condition mean min max 4 h after light 8.9790925 8.968068 8.990117 8 h after light 8.669691 8.640613 8.698769 12 h after light 9.306535499999999 8.698769 9.914302 4 h after dark 8.518787 8.153472 8.884102 8 h after dark 8.205313499999999 7.315579 9.095048 12 h after dark 8.27989 8.27989 8.27989