condition mean min max 4 h after light 722.7 722.7 722.7 8 h after light 872.95 659.4 1086.5 12 h after light 816.7 783.2 850.2 4 h after dark 1135.95 799.5 1472.4 8 h after dark 1132.0 1076.4 1187.6 12 h after dark 1153.5500000000002 1114.7 1192.4