condition mean min max 4 h after light 10.017785 9.07477 10.9608 8 h after light 10.447565 9.46933 11.4258 12 h after light 12.77125 12.2789 13.2636 4 h after dark 16.44115 15.1908 17.6915 8 h after dark 14.53275 14.0096 15.0559 12 h after dark 12.10115 11.9887 12.2136