condition mean min max 0 h after light 10.8098 10.1535 11.4661 4 h after light 8.554165 7.76592 9.34241 8 h after light 7.776515 7.5168 8.03623 4 h after dark 8.962485000000001 8.8237 9.10127 8 h after dark 8.519745 8.37292 8.66657 12 h after dark 8.636705 8.05539 9.21802