condition mean min max 4 h after light 923.444 738.888 1108.0 8 h after light 1311.95 1270.44 1353.46 12 h after light 890.1585 845.251 935.066 4 h after dark 1868.92 1693.3 2044.54 8 h after dark 1574.285 1511.43 1637.14 12 h after dark 1330.79 1214.2 1447.38