condition mean min max 4 h after light 9.473935 8.33327 10.6146 8 h after light 10.294255 9.72051 10.868 12 h after light 15.0948 14.1463 16.0433 4 h after dark 17.610100000000003 16.4359 18.7843 8 h after dark 16.31295 16.1955 16.4304 12 h after dark 13.1467 12.9007 13.3927