Mass-loss rates as a function of different temperature scales for a series of dynamically consistent atmosphere models with log L/L_⊙ = 5.35, M = 12.9 M_⊙, and X_H = 0.2: The thick red dashed line denoted the classical effective temperatures defined at a Rosseland optical depth of τ_R = 2/3, while the green solid line and the blue dashed-dotted lines denotes the effective temperatures referring to τ_crit and τ_R,cont = 20 respectively. The green dotted line on the right denotes the (electron) temperature at the critical point. Curves in lighter colors reflect models using the simple integration treatment suppressing negative velocity gradients.