condition mean min max 4 h after light 1966.4 1966.4 1966.4 8 h after light 1811.6 1751.9 1871.3 12 h after light 1822.1999999999998 1646.3 1998.1 4 h after dark 1440.9499999999998 1199.8 1682.1 8 h after dark 1575.3 1239.5 1911.1 12 h after dark 2140.75 1768.1 2513.4