condition mean min max 4 h after light 16.258551999999998 15.621065 16.896039 8 h after light 18.0453585 13.748756 22.341961 12 h after light 15.161845 13.184097 17.139593 4 h after dark 16.966935499999998 15.972142 17.961729 8 h after dark 20.4092615 17.858856 22.959667 12 h after dark 14.577886 14.577886 14.577886