These results suggest that the energy transfer direction within the FCP complex from P. tricornutum is different from what was proposed earlier for another FCP complex and that the Chl-c2 pigment might be acting as terminal emitter in the energy funnel. This differs also from the experimental findings for the FCP complex from another diatom, i.e., C. meneghiniana and questions the energy flow pathways in various diatom organisms.