Observed Hα luminosity function at z = 3.8 − 6.6, split in three redshift bins. Solid circles show the observed number densities, which are transparent when their average completeness is below 65% (these values are not considered for the fit). Solid lines within shaded regions show the fitted Schechter functions and the 68% confidence intervals. Also shown are the results of FLARES (Lovell et al. 2021; Vijayan et al. 2021) and SPHINX (Katz et al. 2023) at z ∼ 4, z ∼ 5, and z ∼ 6; and the results of Sun et al. (2023) at z ∼ 6.2.