condition mean min max 4 h after light 1942.1 1942.1 1942.1 8 h after light 1728.55 1380.1 2077.0 12 h after light 1708.0500000000002 1503.9 1912.2 4 h after dark 1573.0 1215.7 1930.3 8 h after dark 1543.0 1199.2 1886.8 12 h after dark 2792.05 1791.3 3792.8