Size-dependent trends in the 1 L a excitation energies are plotted in Fig. . Consistent with TD-LRC-ωPBE error statistics discussed above, the two tuning schemes afford very similar results although a slight difference emerges as the number of rings increases, with systematically lower excitation energies for IE tuning. However, the difference amounts to only 0.1 eV for nonacene (smaller than the inherent accuracy for acenes where benchmarks are available), despite a significant difference between ω IE and ω GDD . This situation is reminiscent of the CT data in Fig. , where modest differences between ω IE and ω GDD did not manifest as significant differences in excitation energies.