Comparison between PRD and CRD profiles for D = 1000 km and T = 8000 K. Profiles with increasing intensity correspond to increasing gas pressures p = 0.001,0.1, and 0.5 dyne cm^-2. Black profiles correspond to PRD and gray ones to CRD having enhanced wings. For hydrogen, which determines the electron density, the PRD approach was used for Lyman α and Lyman β lines. The gray dash then shows the effect of using CRD for both hydrogen and Mg ii.