condition mean min max 4 h after light 1687.7 1687.7 1687.7 8 h after light 1493.0500000000002 1432.4 1553.7 12 h after light 1452.5 1168.8 1736.2 4 h after dark 1234.45 875.5 1593.4 8 h after dark 1349.6999999999998 757.3 1942.1 12 h after dark 2495.4 1621.0 3369.8