Composite luminosity function of the H II regions detected within (magenta) and outside (cyan) the i-band effective radius of the target galaxies normalised to the total number of H II regions with L(Hα)≥10³⁷ erg s⁻¹ within (N_tot = 4194) and outside (N_tot = 9084) the effective radius. The vertical dashed line shows the completeness of the survey. The small panel in the top right corner indicates the 1σ probability distribution of the fitted Schechter function parameters.