Observational mass-loss rates of Yang et al. (2023) showing a kink at log L/L_⊙  = 4.6. We adopt a Γ dependent mass-loss relation from our understanding of radiation-driven winds by utilising a shallow and a steep mass loss relation respectively below and above the kink from Vink et al. (2011). The two blue and two red lines are for different values of current masses 8 M_⊙ (upper line) and 30 M_⊙ (lower line). Also shown (black dotted) is a third degree polynomial fit in luminosity derived by Yang et al. (2023)