condition mean min max 4 h after light 9.7136125 8.598158 10.829067 8 h after light 11.557438000000001 11.301493 11.813383 12 h after light 15.034655 12.630691 17.438619 4 h after dark 21.289015 13.726874 28.851156 8 h after dark 19.629586 16.46404 22.795132 12 h after dark 13.811831 13.811831 13.811831