Both parameterizations of DFT/CIS have a core correction that works very well for second-row elements (through Ne), offsetting errors in the Kohn-Sham eigenvalues for core states. Table illustrates the accuracy for K-edge excitations (1s → LUMO) of the elements carbon, oxygen, and nitrogen, in comparison to theoretical best estimates of the excitation energies that were compiled in Ref. 19 from various sources. TD-CAM-B3LYP, TD-B3LYP and TD-SRC1-r1 results are also included, as are DFT/MRCI values from Ref. 19.