condition mean min max 3 h after light 8.942256666666667 7.87951 10.3748 6 h after light 7.65789 5.43597 8.91375 9 h after light 9.59272 7.93029 12.185 12 h after light 12.017425 10.0961 13.4496 3 h after dark 17.861566666666665 15.3686 19.2856 6 h after dark 17.925266666666666 15.7242 20.8878 9 h after dark 12.9884 11.2423 14.3748 12 h after dark 11.1699 10.6912 11.6486