condition mean min max 4 h after light 1146.3 1146.3 1146.3 8 h after light 1421.65 1359.6 1483.7 12 h after light 1301.9 1087.7 1516.1 4 h after dark 1116.1 1086.5 1145.7 8 h after dark 1098.7 785.4 1412.0 12 h after dark 1039.25 835.5 1243.0