In addition to the excitation energies, we have calculated the linear absorption spectrum of the FCP complex and compared it to the experimental literature . Only a minimal contribution of the Chl-c molecules to the total absorption was observed, whereas the Chl-a pigments have the largest contribution. Interestingly, the high-frequency side-band of the FCP absorption spectrum is attributed to the vibrational side-band of the Chl-a molecules. This finding strongly questions earlier assumptions that the high-frequency side-band in the linear absorption spectrum of the FCP complex from the diatom C. meneghiniana is due to the contribution of Chl-c molecules .