condition mean min max 4 h after light 1218.5 1218.5 1218.5 8 h after light 1149.15 944.0 1354.3 12 h after light 1061.6 954.8 1168.4 4 h after dark 1117.7 908.7 1326.7 8 h after dark 1309.45 1247.2 1371.7 12 h after dark 1315.45 1190.7 1440.2