condition mean min max 4 h after light 2316.8 2316.8 2316.8 8 h after light 2085.95 1940.6 2231.3 12 h after light 1414.2 752.6 2075.8 4 h after dark 1111.75 698.6 1524.9 8 h after dark 1819.5 1487.6 2151.4 12 h after dark 1906.9 1884.0 1929.8