Accretion luminosity as a function of stellar luminosity. Blue and red dots represent the older (age greater than 8 Myr) and younger (age smaller than 8 Myr) PMS candidates of LH 91, respectively. The gray filled dots, green diamonds, and black empty dots are the PMS of LH 95 by Biazzo et al. (2019), SN 1987A by De Marchi et al. (2010), and 30 Dor by De Marchi et al. (2017), respectively. The dashed lines show the linear L_acc − L_⋆ relationship for different values of the coefficient, as indicated.