condition mean min max 4 h after light 1758.7 1758.7 1758.7 8 h after light 1859.6 1811.0 1908.2 12 h after light 1827.15 1724.2 1930.1 4 h after dark 1777.9 1622.2 1933.6 8 h after dark 1952.05 1840.1 2064.0 12 h after dark 1880.95 1745.9 2016.0