condition mean min max 4 h after light 1086.2 1086.2 1086.2 8 h after light 1073.35 1059.1 1087.6 12 h after light 1098.75 1074.6 1122.9 4 h after dark 1060.65 1024.3 1097.0 8 h after dark 1151.7 1130.9 1172.5 12 h after dark 1114.4 1089.2 1139.6