condition mean min max 4 h after light 1422.1 1422.1 1422.1 8 h after light 1563.2 1523.2 1603.2 12 h after light 1461.25 1342.6 1579.9 4 h after dark 1474.95 1297.5 1652.4 8 h after dark 1267.25 1061.3 1473.2 12 h after dark 1072.3 917.5 1227.1