condition mean min max 2 h after light 18.58525 15.3804 22.5653 6 h after light 16.0682 13.109 21.4427 10 h after light 15.259 10.8789 18.5048 14 h after light 17.287033333333333 12.5052 21.1841 18 h after light 17.427366666666668 13.0806 22.116 2 h after dark 27.38365 22.2746 33.0156