condition mean min max 4 h after light 1076.124414 974.979847 1177.268981 8 h after light 969.1260574999999 824.924584 1113.327531 12 h after light 1105.9613534999999 1068.874623 1143.048084 4 h after dark 1217.47345 1137.161315 1297.785585 8 h after dark 1044.4856995 889.493288 1199.478111 12 h after dark 1136.934814 1136.934814 1136.934814