condition mean min max 4 h after light 1478.1 1478.1 1478.1 8 h after light 1281.15 1153.9 1408.4 12 h after light 826.45 648.5 1004.4 4 h after dark 1003.7 655.2 1352.2 8 h after dark 1282.65 1243.3 1322.0 12 h after dark 1475.75 1241.0 1710.5