condition mean min max 4 h after light 7.86767 6.925478 8.809862 8 h after light 10.6914675 9.180282 12.202653 12 h after light 10.1277175 8.111679 12.143756 4 h after dark 7.6154885 7.5474 7.683577 8 h after dark 8.7221925 6.989995 10.45439 12 h after dark 8.27989 8.27989 8.27989