condition mean min max 4 h after light 1021.7 1021.7 1021.7 8 h after light 872.7 808.8 936.6 12 h after light 940.05 836.0 1044.1 4 h after dark 951.65 723.2 1180.1 8 h after dark 851.6 806.2 897.0 12 h after dark 736.9000000000001 681.6 792.2