condition mean min max 4 h after light 1925.3 1925.3 1925.3 8 h after light 1321.5 1128.0 1515.0 12 h after light 1119.2 996.4 1242.0 4 h after dark 1455.4 1106.2 1804.6 8 h after dark 1872.65 1671.0 2074.3 12 h after dark 1846.75 1839.7 1853.8