Fraction of the total escaping LyC luminosity emitted by galaxies brighter than a given Lyα luminosity limit as a function of the Lyα luminosity limit. Here we compare this fraction for two sets of galaxy samples: all galaxies at level 1 with M_⋆ > 10⁶ M_⊙ (red points) and all galaxies at level 1 with M_⋆ > 10⁵ M_⊙ (blue points). These galaxies are all taken from the z=6 snapshot. So, the denominator of the fraction is same in both cases: the total LyC emission from all galaxies (at level 1) at z = 6. The numerator calculates the total LyC luminosity of the galaxies brighter than a given Lyα luminosity limit with the two samples, for example the total LyC emitted by all galaxies (at level 1) with M_⋆ > 10⁶ (or 10⁵) M_⊙ and > 10⁴⁰ erg s⁻¹. The histograms above show the number of galaxies brighter than the corresponding Lyα luminosity limit, for example the number of galaxies with for the two mass limits. This is also the number of galaxies used to calculate the corresponding fractions shown in the main plot. We find that when we take all galaxies with M_⋆ > 10⁶ (10⁵)M_⊙, LAEs brighter than 10⁴⁰ erg s⁻¹ can account for 95% (97%) of the total ionizing luminosity.