Luminosity of the model [O I] (top), [O II] (second row), [O III] (third row), and O I (bottom) lines compared to the observed line luminosities and luminosity limits from SN 2012au at six years for the realistic composition at three different values of T_PWN. The green circled points represent where the model and observed values are within a factor of 2two, the purple circles within a factor of five, and the gray shaded region also within a factor of five. The black circled points represent where the model luminosity is more than a factor of two higher than the observational limit. The grid includes luminosity from all elements in the wavelength regions in which these lines are emitted.