Luminosity distribution of H ii regions and MYSOs associated with the filaments. The left hand panel shows the distribution of all H ii regions and MYSOs in the ATLASGAL region identified by the RMS survey (grey histogram) and those associated with a filament (magenta hatched histogram). The right hand panel shows the cumulative distribution of the luminosity for all massive RMS sources (black curve) and those associated with the filaments identified in this paper.