Line luminosity as a function of accretion luminosity. Both quantities were normalized to the stellar luminosity. From top to bottom: [O I]630 NLVC and H₂ [1,4] and [1,7] sum. Red dots indicate values found in Gangi et al. (2022) and France et al. (2012) for a sample of CTTs in the Taurus-Auriga association. Linear fits to the all data points are marked by dashed lines. The analytical solution and Pearson coefficients are also labeled.