condition mean min max 4 h after light 1539.3 1539.3 1539.3 8 h after light 1582.9 1424.6 1741.2 12 h after light 1631.35 1529.6 1733.1 4 h after dark 1591.65 1445.6 1737.7 8 h after dark 1540.1999999999998 1417.3 1663.1 12 h after dark 1759.55 1645.6 1873.5