condition mean min max 4 h after light 8.457136666666667 7.954089999999999 8.80156 8 h after light 6.06396 5.77877 6.347169999999999 12 h after light 5.8624 5.7967699999999995 5.94566 4 h after dark 6.615823333333333 6.3784 6.7409300000000005 8 h after dark 8.331556666666668 7.9154 9.04509 12 h after dark 11.058786666666666 10.714789999999999 11.23378