For the 3-chromophore circuit, implementation errors could hinder the intended exciton flow reversal with changing light direction. This manifests as a bias in exciton delocalization toward a linear chromophore optimally oriented to the light pulse, regardless of the light's circular polarization used. Such an error is quantifiable by comparing the populations of the two linear chromphores under a different light direction (e.g., RCP or LCP light), with no discrepancy indicating perfect flow reversal: