condition mean min max 0 h after light 5.63884 5.53194 5.74574 4 h after light 8.883605 8.7635 9.00371 8 h after light 11.621500000000001 10.5568 12.6862 4 h after dark 16.59065 12.7361 20.4452 8 h after dark 12.444500000000001 11.3983 13.4907 12 h after dark 5.721285 5.01113 6.43144