condition mean min max 0 h after light 20.6447 20.3194 20.97 4 h after light 11.93805 11.7294 12.1467 8 h after light 10.010079999999999 9.81706 10.2031 4 h after dark 12.72735 12.5377 12.917 8 h after dark 14.60065 13.6159 15.5854 12 h after dark 16.2387 14.0503 18.4271