log L_acc as a function of the wavelength for two PENELLOPE CTTSs. Filled (empty) circles are log L_acc values computed using empirical relations, corresponding to suggested (non suggested) lines by Alcalá et al. (2014), while triangles represent upper limits. In red and blue results obtained by dereddening the flux with $A_V^{diff}$ and $A_V^{XS}$ are shown, respectively. Horizontal red and blue dashed lines and regions correspond to mean value and standard deviation of L_acc using $A_V^{diff}$ and $A_V^{XS}$, respectively. The orange solid line shows $L_{\text{acc\hspace{0.17em}}}^{XS}$ with its error bar (orange horizontal region). Top: plot for the multiple system VW Cha, where the extinction and accretion luminosity estimated with the difference method and the XS-fit are in agreement and the log L_acc distributions are flat. Bottom: SO1152 young star, where $A_V^{diff}$ and $A_V^{XS}$ differ by 1.5 mag and the distribution of log L_acc obtained by dereddening the fluxes with $A_V^{diff}$ is flatter than the one obtained using $A_V^{XS}$. The latter increases with the wavelength.