condition mean min max 4 h after light 853.9 853.9 853.9 8 h after light 773.0 695.4 850.6 12 h after light 830.15 770.8 889.5 4 h after dark 1084.8 931.9 1237.7 8 h after dark 1455.0 1227.3 1682.7 12 h after dark 1563.6999999999998 1532.3 1595.1