condition mean min max 4 h after light 1842.0 1842.0 1842.0 8 h after light 1763.6 1760.1 1767.1 12 h after light 1409.25 1351.7 1466.8 4 h after dark 1591.15 1367.9 1814.4 8 h after dark 1792.1999999999998 1358.3 2226.1 12 h after dark 2423.4 1936.0 2910.8