condition mean min max 4 h after light 1976.4 1976.4 1976.4 8 h after light 2113.65 2084.4 2142.9 12 h after light 1939.2 1775.6 2102.8 4 h after dark 1786.4499999999998 1666.8 1906.1 8 h after dark 1926.45 1883.4 1969.5 12 h after dark 1776.5 1715.3 1837.7