condition mean min max 4 h after light 1301.3 1301.3 1301.3 8 h after light 1318.05 1231.8 1404.3 12 h after light 1458.25 1070.2 1846.3 4 h after dark 1311.5 985.2 1637.8 8 h after dark 1202.0500000000002 1056.9 1347.2 12 h after dark 1348.45 1231.9 1465.0