Photometric and spectral evolution of the novae that show a transition from Fe II to He/N classes. For each nova, the left panel displays its AAVSO V light curve, and the right panels display zoomed-in views of the V light curve (upper), of the κ_FeII (blue) and κ_He/N (red) coefficients (middle), and the κ coefficient (bottom). The gray dashed lines indicate the epochs of the available spectra.