condition mean min max 4 h after light 827.5 827.5 827.5 8 h after light 1215.4 1127.2 1303.6 12 h after light 1215.4 1092.6 1338.2 4 h after dark 1389.85 1225.3 1554.4 8 h after dark 1729.15 1704.4 1753.9 12 h after dark 1771.0 1589.7 1952.3