condition mean min max 4 h after light 805.8 805.8 805.8 8 h after light 813.85 754.6 873.1 12 h after light 860.3 814.7 905.9 4 h after dark 1056.3 744.1 1368.5 8 h after dark 1408.85 1314.3 1503.4 12 h after dark 1224.65 1209.5 1239.8