Luminosity function Φ at 1600 Å of the simulated galaxies (red solid). The red shaded region shows the 68% spread in Φ, which at the faint end reflects a scatter in the intrinsic UV luminosity, and at the bright also the anisotropic escape of UV radiation due to dust, as well as small-number statistics. Yellow and green dots with error bars show the observed LFs at z ∼ 8 (Bouwens et al. 2015) and z ∼ 10 (Oesch et al. 2018), respectively, with the associated solid lines showing the best-fitting Schechter (1976)-functions. The number of simulated galaxies used for our fit is shown in solid black, with the corresponding numbers on the right y axis.