condition mean min max 4 h after light 1249.7 1249.7 1249.7 8 h after light 1228.1 1196.3 1259.9 12 h after light 1197.2 913.9 1480.5 4 h after dark 1687.6 1411.5 1963.7 8 h after dark 1890.9 1514.9 2266.9 12 h after dark 1328.65 1312.4 1344.9