condition mean min max 2 h after light 7.62787 7.54901 7.66748 6 h after light 9.9415 9.78083 10.262 10 h after light 11.4573 11.2194 11.8524 2 h after dark 13.8829 13.1434 15.0986 6 h after dark 14.387866666666667 13.8525 15.0065 10 h after dark 12.4729 12.1626 12.9966