condition mean min max 4 h after light 15.332809 14.577886 16.087732 8 h after light 13.4479425 11.828802 15.067083 12 h after light 13.065676 12.584876 13.546476 4 h after dark 16.683989 16.15923 17.208748 8 h after dark 11.333523 10.083845 12.583201 12 h after dark 11.569798 11.569798 11.569798