condition mean min max 4 h after light 2.83104 2.55772 3.10436 8 h after light 6.23623 5.43764 7.03482 12 h after light 8.76652 8.14719 9.38585 4 h after dark 8.641653333333334 8.3953 8.94458 8 h after dark 7.955513333333333 6.62325 10.1687 12 h after dark 5.387426666666666 3.88062 6.56342