condition mean min max 4 h after light 1223.3 1223.3 1223.3 8 h after light 1190.35 1171.7 1209.0 12 h after light 1237.1 1047.7 1426.5 4 h after dark 1485.1 1301.9 1668.3 8 h after dark 1596.0 1563.6 1628.4 12 h after dark 1489.95 1480.2 1499.7