Unclumped wind momentum versus luminosity. Black filled circles are dwarfs (luminosity class v), open black squares are giants (iii-iv), filled squares are supergiants (i-ii), red triangles are Of/WN stars, and blue asterisks are WNh and WN(h) stars. The yellow arrow indicates the shift of an O star, if a gravity lowered by 0.5 dex would be used for the analysis of the (super)giants. The typical error is ±0.3 dex and Δlog L is ±0.1 dex.