condition mean min max 0 h after light 11.96945 11.958 11.9809 4 h after light 17.33015 16.089 18.5713 8 h after light 17.0991 16.5698 17.6284 4 h after dark 14.89595 14.7047 15.0872 8 h after dark 14.11595 14.1114 14.1205 12 h after dark 11.1451 10.817 11.4732