condition mean min max 4 h after light 1.43991 1.37793 1.50189 8 h after light 2.02837 1.97365 2.08309 12 h after light 2.51699 2.09851 2.93547 4 h after dark 4.611205 4.37037 4.85204 8 h after dark 3.115825 2.94832 3.28333 12 h after dark 2.990635 2.97346 3.00781