condition mean min max 4 h after light 1539.6 1539.6 1539.6 8 h after light 1559.85 1142.5 1977.2 12 h after light 1658.1 1490.9 1825.3 4 h after dark 1730.75 1192.7 2268.8 8 h after dark 1863.35 1451.6 2275.1 12 h after dark 1931.1000000000001 1765.4 2096.8