Correlation of L_acc-L_Brγ for Class II objects in the literature. In red we show measurements for stars below about one solar mass (from Alcalá et al. 2017), in blue for intermediate mass stars (from Fairlamb et al. 2017). The red dotted line and blue dashed lines show the literature correlations, derived for each sample separately. The light green line shows the correlation we derive for the range −5.5 ≤ (L_Brγ/L_⊙) ≤ 0.5. The dark green band shows the uncertainty in the fit.