condition mean min max 0 h after light 23.2603 22.2906 24.23 4 h after light 9.02902 8.96988 9.08816 8 h after light 10.454525 9.26095 11.6481 4 h after dark 15.09305 13.1918 16.9943 8 h after dark 9.440825 8.96014 9.92151 12 h after dark 16.2898 14.5867 17.9929