Average stellar mass-normalized iSED of stellar sources (red), XRB (magenta), hot-ISM (cyan), and all source types combined (black) at z = 11.9 (solid), 10.07 (dashed), 7.88 (dash-dotted), and 6.99 (dotted) obtained from the LG20 simulation. These results are the mean values of all galaxies with > 10⁴ M_⊙. The slight differences (< 10%) observed in ⟨iSED⟩ at various redshifts are due to the evolution of galactic properties such as metallicity and stellar age.