condition mean min max 0 h after light 990.645 984.937 996.353 4 h after light 922.769 855.102 990.436 8 h after light 595.0575 546.643 643.472 4 h after dark 1021.4270000000001 992.224 1050.63 8 h after dark 1053.5700000000002 1028.42 1078.72 12 h after dark 1062.375 1012.63 1112.12