condition mean min max 4 h after light 5.868565 4.23906 7.49807 8 h after light 10.030125 9.74815 10.3121 12 h after light 10.05574 9.15488 10.9566 4 h after dark 11.997 11.6274 12.3666 8 h after dark 9.25727 8.68964 9.8249 12 h after dark 7.537585 6.99403 8.08114