Comparison of the L_⋆ derived here for the targets (Sect. 3.2) with those from N06 and corrected for distance as discussed by Rigliaco et al. (2011a). The dotted lines show a difference between the L_⋆ values of a factor 2. The only object with a significantly larger difference is ISO−Oph033, but its L_⋆ has been revised by Comerón et al. (2010) and the latter value, in agreement with ours, is reported with an empty symbol. One sigma uncertainties in our estimates are reported, and are sometimes smaller than the symbol.