Two example combined spectra of target galaxy (blue) and light cone emission in two selected subregions (R2 and R4). The spectrum energy range shown here is 0.4 − 0.85 keV and the bin width is 0.2 eV. These were calculated within a radius of R_200c of the target galaxy and centered on the galaxy. The top panel presents spectra of a subregion (R4) with abundant strong emission lines from the light cone. The bottom panel shows spectra of a subregion (R2) with less abundant emission lines from the light cone. The labeled vertical black bars denote the most significant emission lines in the light cone, with identities and redshifts tagged. SFG represents star-forming galaxies, QG represents quenched galaxies, and DG represents diffuse gas.