  We investigate the global photometric scaling relations traced by early-type
galaxies in different environments, ranging from dwarf spheroidals, over dwarf
elliptical galaxies, up to giant ellipticals (-8 mag > M_V > -24 mag). These
results are based in part on our new HST/ACS F555W and F814W imagery of dwarf
spheroidal galaxies in the Perseus Cluster. These scaling relations are almost
independent of environment, with Local Group and cluster galaxies coinciding in
the various diagrams. We show that at M_V ~ -14 mag, the slopes of the
photometric scaling relations involving the Sersic parameters change
significantly. We argue that these changes in slope reflect the different
physical processes that dominate the evolution of early-type galaxies in
different mass regimes. As such, these scaling relations contain a wealth of
information that can be used to test models for the formation of early-type
galaxies.
