condition mean min max 4 h after light 2183.0 2183.0 2183.0 8 h after light 2107.85 2061.6 2154.1 12 h after light 2044.45 2000.4 2088.5 4 h after dark 2044.1 1908.0 2180.2 8 h after dark 2035.25 1878.5 2192.0 12 h after dark 1976.4 1929.4 2023.4