condition mean min max 4 h after light 1077.4 1077.4 1077.4 8 h after light 1135.75 1071.9 1199.6 12 h after light 1076.95 1000.6 1153.3 4 h after dark 1000.95 986.2 1015.7 8 h after dark 952.3 934.6 970.0 12 h after dark 887.35 791.7 983.0