condition mean min max 4 h after light 1213.6 1213.6 1213.6 8 h after light 841.2 817.9 864.5 12 h after light 735.8 727.1 744.5 4 h after dark 880.5 702.8 1058.2 8 h after dark 867.65 853.3 882.0 12 h after dark 943.0 764.4 1121.6