condition mean min max 4 h after light 2001.942222 1894.84 2169.053333 8 h after light 1896.2849999999999 1852.925 1919.716667 12 h after light 1793.751111 1744.076667 1851.573333 1.5 h after dark 1894.1833333333334 1689.156667 2086.193333 5.5 h after dark 2268.768889 2186.08 2311.97 9.5 h after dark 2136.6122219999997 1937.24 2292.253333