A showerhead having a plurality of spray modes including a manifold defining a plurality of mode apertures, a front channel plate, a rear channel plate, and a radial mode changer. The layer system includes a substrate and a ceramic outer layer. For every piece of the candidate additional information, a sum of the individual compatibility degrees of the reference attributes which are correlated with the image attributes acquired from the image are calculated as a total compatibility degree. The biomass is grown year round and produces multiple crops per acre. The positions are shifted from each other so as to cause the zero or non-zero diffraction order term or interference term corresponding to each selected zero or non-zero diffraction order to be eliminated or obtained.