condition mean min max 2 h after light 1.6138033333333333 1.07069 2.36931 6 h after light 1.6469399999999998 1.02079 2.34847 10 h after light 1.9258216666666668 0.92464 4.62288 14 h after light 1.464789 0.614891 1.91932 18 h after light 1.3370795 0.684017 2.12458 2 h after dark 2.347675 1.63301 3.7748