Light curve for LkHα 225 South from the 1980s to the present, demonstrating the gradual fade over about 15 yr and subsequent rise by >6 mag over the next 20 yr. The published R-band data have been transformed to r using an advertised transformation equation (http://www.sdss3.org/dr8/algorithms/sdssUBVRITransform.php#Lupton2005), with the correction here typically a shift by 0.6 mag fainter. The PanSTARRS and ZTF photometry has been converted from native AB to Vega magnitudes. The Gaia DR2 G-band photometry has been corrected into the r band using the transformation equation derived by Hillenbrand et al. (2018), in this case around 0.1 mag fainter. Data points from Herbst & Shevchenko (1999) are lower limits and based on their measured V-band brightness and an assumed V − R > 3 mag, then using the above conversion to r. Expansion of part of the ZTF time series appears in Figure 4.