condition mean min max 4 h after light 1187.0 1187.0 1187.0 8 h after light 1003.55 875.4 1131.7 12 h after light 686.55 672.8 700.3 4 h after dark 776.8 685.6 868.0 8 h after dark 902.0 867.1 936.9 12 h after dark 914.0 724.4 1103.6