condition mean min max 4 h after light 1591.8 1591.8 1591.8 8 h after light 1413.75 1346.5 1481.0 12 h after light 1464.3 1257.0 1671.6 4 h after dark 1393.15 1230.3 1556.0 8 h after dark 1275.95 1152.7 1399.2 12 h after dark 1434.8 1377.0 1492.6