Based on the exciton model presented in Section 2, absorption spectra were computed on the same structures as was done in the previous section, but from the exciton transition energies and the exciton oscillator strength (eq 11). The resulting spectra using the exciton model for solutes 1 and 2 in water are presented in Figure . As was observed for the systems with the large QM region (Figure for water), the use of an exciton model also improves the resulting spectra compared to only including the solute in the QM region (Figure ).