condition mean min max 4 h after light 1851.3 1851.3 1851.3 8 h after light 1604.85 1336.6 1873.1 12 h after light 1467.5500000000002 1222.2 1712.9 4 h after dark 1382.4 1268.3 1496.5 8 h after dark 1382.9 1261.4 1504.4 12 h after dark 1247.15 998.8 1495.5