condition mean min max 4 h after light 1836.0 1836.0 1836.0 8 h after light 1643.1 1593.9 1692.3 12 h after light 1838.5500000000002 1558.7 2118.4 4 h after dark 1774.4 1695.6 1853.2 8 h after dark 1687.0500000000002 1665.2 1708.9 12 h after dark 1623.4499999999998 1533.3 1713.6