condition mean min max 4 h after light 12.8777 12.6935 13.0619 8 h after light 8.692995 8.61894 8.76705 12 h after light 12.1359 11.1927 13.0791 4 h after dark 12.777000000000001 11.5784 13.9756 8 h after dark 18.6825 18.2803 19.0847 12 h after dark 15.66635 14.5944 16.7383