condition mean min max 4 h after light 1036.7 1036.7 1036.7 8 h after light 1213.8 1138.6 1289.0 12 h after light 1362.8 1304.6 1421.0 4 h after dark 1368.9 1363.3 1374.5 8 h after dark 1336.9 1286.1 1387.7 12 h after dark 1102.15 1093.4 1110.9