condition mean min max 0 h after light 20.27335 18.438 22.1087 2 h after light 10.78125 10.7642 10.7983 4 h after light 11.8341 11.6782 11.99 8 h after light 13.06945 12.8896 13.2493 12 h after light 16.49815 14.9285 18.0678 2 h after dark 15.6539 14.5433 16.7645 4 h after dark 18.2632 17.7691 18.7573 8 h after dark 24.37775 22.9718 25.7837 12 h after dark 20.1785 19.6815 20.6755