Comparison of synthetic H_α profiles, for models with T_eff = 36000 K, log g =3.40, and differing wind-clumping properties. Black: unclumped wind with log Q = −11.90. Orange: clumped model with the same mass-loss rate/wind strength parameter, using the Linear_10–025 law. Red: clumped model with the same clumping properties/clumping law, but a mass-loss rate reduced by . Green and blue: same as the orange and red models, respectively, but using the Linear₁₀–₀₅₀ law (the orange and green profiles are nearly coincident). All profiles have been broadened by V sin i = V_mac = 50 km s⁻¹, adopting a resolving power of 12000.