condition mean min max 4 h after light 944.5 944.5 944.5 8 h after light 1202.0500000000002 997.7 1406.4 12 h after light 2101.6499999999996 1358.6 2844.7 4 h after dark 1915.65 1001.4 2829.9 8 h after dark 986.95 780.5 1193.4 12 h after dark 604.3 506.3 702.3