condition mean min max 4 h after light 1274.1 1274.1 1274.1 8 h after light 943.45 827.7 1059.2 12 h after light 930.45 914.4 946.5 4 h after dark 851.85 809.2 894.5 8 h after dark 803.8 787.2 820.4 12 h after dark 937.0 883.9 990.1