condition mean min max 4 h after light 12.653246 9.650615 15.655877 8 h after light 17.0934205 14.431671 19.75517 12 h after light 14.2769055 13.341018 15.212793 4 h after dark 18.073531 13.440972 22.70609 8 h after dark 14.0857505 11.19374 16.977761 12 h after dark 15.771448 15.771448 15.771448