condition mean min max 4 h after light 15.9382 15.3566 16.5198 8 h after light 16.453 15.1314 17.7746 12 h after light 14.953399999999998 13.0097 16.8971 4 h after dark 11.489 10.3748 12.6032 8 h after dark 14.3839 14.335 14.4328 12 h after dark 18.4084 17.3172 19.4996