condition mean min max 4 h after light 1109.8 1109.8 1109.8 8 h after light 1042.15 974.7 1109.6 12 h after light 977.0 938.2 1015.8 4 h after dark 1100.8 962.9 1238.7 8 h after dark 1237.1 1177.1 1297.1 12 h after dark 1212.4 1187.6 1237.2