condition mean min max 4 h after light 6.7653 4.63929 8.89131 8 h after light 2.970415 1.95833 3.9825 12 h after light 2.71693 2.22088 3.21298 4 h after dark 2.37085 1.8339 2.68757 8 h after dark 2.3405633333333333 1.74355 3.18855 12 h after dark 5.308023333333333 3.7564 7.2475