condition mean min max 4 h after light 949.3 949.3 949.3 8 h after light 975.75 966.3 985.2 12 h after light 1100.45 1003.9 1197.0 4 h after dark 1440.6 1227.3 1653.9 8 h after dark 1412.65 1169.0 1656.3 12 h after dark 1100.1 1011.7 1188.5