Finally, we investigated the influence of the electronic structure method during structure optimization. Instead of the GGA BLYP, the more expensive hybrid functional B3LYP was selected for structure optimization. The influence is overall negligible for absorption energies obtained by BLYP and B3LYP, compare Table and S9 in SI. In case of the RSH CAM-B3LYP, the errors without energy scaling are even increased pointing to some error compensation for the most reliable approach (see SI, Figure ). Nonetheless, global scaling of energy provides nearly identical results. Thus, as long as the correct combination of scaling factor, structure optimization setup and absorption energies calculation approach are selected, results can be barely improved.