condition mean min max 4 h after light 1769.8 1769.8 1769.8 8 h after light 1787.75 1452.9 2122.6 12 h after light 1295.85 973.9 1617.8 4 h after dark 1247.65 1002.1 1493.2 8 h after dark 1376.4 1325.3 1427.5 12 h after dark 1658.45 1585.0 1731.9