Top panel: optical and NIR absolute magnitude light curves of the full CSP SN IIn sample plotted vs. days relative to the epoch of discovery. Bottom panel: the r-band absolute magnitude light curves for the full CSP SN IIn sample are compared to those of other SNe IIn in the literature. Photometry and values of E(B − V)_host of SNe 1998S, 2005db, 2005ip, 2006jd, and 2011ht are taken from Liu et al. (2000), Kiewe et al. (2012), S12 and Mauerhan et al. (2013a). To set the absolute flux scale, luminosity distances from NED were adopted, using WMAP5 cosmological parameters and correcting for peculiar motions.