Further, the brightest among the nπ * states was selected as an initial electronic state for a surface hopping trajectory. In Fig. )UDFWLRQRILQLWLDOFRQGLWLRQV The initial localization can occur on any of the four monomers of a tetramer as shown in Fig. , right, where we plot distributions for initial localization. To do so, the diagonal of the FTDM (F) matrix is considered to identify the monomer bearing the highest F XX value (at a given aggregate geometry). Considering an ensemble of the initial conditions, we count how many times monomer X (m X ) traps the exciton. As can be seen in Fig. , right, the localization distributions are qualitatively more uniform for the the models with a = 5.5