What are the lighting setups that I can change here?
You can set which bank of the Tri-Lucent is turned on: Diffuse, Direct or Polarized. You can enable each separately and disable all, but only Direct and Polarized can be enabled at the same time and Diffuse can only be enabled exclusively. You can also use the factory configured lighting setups and make further imager configurations on the Light and Imager Settings pane.