condition mean min max 4 h after light 1624.1 1624.1 1624.1 8 h after light 1422.1 1365.6 1478.6 12 h after light 1693.1999999999998 1421.3 1965.1 4 h after dark 1778.65 1719.6 1837.7 8 h after dark 1833.05 1554.1 2112.0 12 h after dark 1868.25 1734.8 2001.7