condition mean min max 3 h after light 5.75964 4.77272 6.59397 6 h after light 5.39032 5.00868 5.65953 9 h after light 7.843976666666666 7.0676 8.65982 12 h after light 10.992866666666666 10.3858 11.9772 3 h after dark 14.9893 14.6632 15.5756 6 h after dark 19.593533333333333 18.9583 20.8295 9 h after dark 13.0388 11.6593 14.4212 12 h after dark 6.35762 5.12065 7.88336