  For light harvesters with a reaction center complex (LH1-RC complex) of three
types, we propose an experiment to verify our analysis based upon antenna
theories that automatically include the required structural information. Our
analysis conforms to the current understanding of light-harvesting antennae in
that we can explain known properties of these complexes. We provide an
explanation for the functional roles of the notch at the light harvester, a
functional role of the polypeptide called PufX or W at the opening, a
functional role of the special pair, a reason that the cross section of the
light harvester must not be circular, a reason that the light harvester must
not be spherical, reasons for the use of dielectric bacteriochlorophylls
instead of conductors to make the light harvester, a mechanism to prevent
damage from excess sunlight, an advantage of the dimeric form, and reasons for
the modular design of nature. Based upon our analysis we provide a mechanism
for dimerization. We predict the dimeric form of light-harvesting complexes is
favoured under intense sunlight. We further comment upon the classification of
the dimeric or S-shape complexes. The S-shape complexes should not be
considered as the third type of light harvester but simply as a composite form.
