condition mean min max 4 h after light 1000.2 1000.2 1000.2 8 h after light 938.1 871.6 1004.6 12 h after light 1053.25 853.2 1253.3 4 h after dark 1102.1999999999998 1092.6 1111.8 8 h after dark 1163.85 877.4 1450.3 12 h after dark 1296.6 1081.4 1511.8