condition mean min max 0 h after light 9.01663 8.73537 9.29789 4 h after light 11.636495 9.45699 13.816 8 h after light 42.9581 39.6438 46.2724 4 h after dark 32.66455 23.1478 42.1813 8 h after dark 17.1773 14.4596 19.895 12 h after dark 9.335825 8.36015 10.3115