condition mean min max 4 h after light 8.213165 7.90284 8.52349 8 h after light 9.788895 9.60431 9.97348 12 h after light 9.74726 8.83992 10.6546 4 h after dark 14.912299999999998 12.7371 17.0875 8 h after dark 12.57405 12.4536 12.6945 12 h after dark 11.21185 10.0797 12.344