Evolutionary tracks in the L – T_eff-diagram, where , for models initially rotating with 100 km s^-1 (for 60, 80, 100, 125, 150, 200, 300, and 500  M_⊙; alternating red and blue lines) and with 400 km s^-1 (100, 150, 200, and 300  M_⊙; green lines). The right y-axis shows the Eddington factor for electron scattering opacity Γ_e, which is proportional to L, for a hydrogen mass fraction of X = 0.74. For X = 0, log Γ_e is larger by 0.23. Triangles, pentagons, and heptagons mark the locations where the surface helium mass fraction reaches 0.3, 0.5, and 0.7, respectively, for the presented evolutionary sequences. The dotted horizontal lines marks the value of Γ_e = 0.7 for X = 0.74 (green) and X = 0 (blue), approximately identifying the true Eddington limit that cannot be exceeded (see text).