Luminosity function of the H II regions detected by HIIPHOT in individual galaxies. The Hα luminosity of individual H II regions is corrected for dust attenuation and [N II] contamination as described in Sec. 3.2. The solid blue and red lines indicate the best fit and 1σ confidence regions for the Schechter luminosity function parametrisation. Black solid dots indicate the number of H II regions in 0.25 dex bins of Hα luminosity above the adopted completeness of the survey (L(Hα) ≥ 10³⁷ erg s⁻¹).