Mean spectra of LAEs with log₁₀(L_Lyα/(erg s⁻¹)) ≤42.0 and > 42.05 (left and right, respectively) are shown in black in the top panels, with the error budget displayed via the gray shaded regions. The median values of log₁₀(L_Lyα/(erg s⁻¹)) for the two subsamples are 41.86 and 42.35, respectively. The vertical lines indicate the rest-frame wavelengths of some of the main spectral features: nebular emission lines (purple), ISM absorption (orange), and fine-structure transitions (green). The bottom panels show the S/N per pixel (gray curves) with the dotted red horizontal line indicating S/N = 3.