Left panels: light curves from the hydrodynamical models and their rise times as a function of three explosion and progenitor parameters (⁵⁶Ni mass, E_K/M_ej, ⁵⁶Ni mixing). The observed correlations are fit with two linear and one power-law functions. These functions are used to build scaling relations aimed at determining the ⁵⁶Ni mixing of our SNe, relations that are calibrated against the parameters of SN 1998bw from Chugai (2000). Right panel: ⁵⁶Ni mixing obtained from the scaling relations determined from the hydrodynamical models and calibrated to SN 1998bw. All of the SNe are strongly (⟩87%) mixed.