Relative errors of the computed spectra fitted by the first (solid curves) and the second (dashed curves) fit procedures vs. photon energy for hydrogen (top panel) and solar H/He mixture with Z = 0.3   Z_⊙ (bottom panel) low gravity (log g = 14.0) models. Corresponding relative luminosities and effective temperatures are given at the curves. The vertical dotted line shows the low boundary of the energy band where fitting procedures were performed. For clarity, models with l = 0.5 and 0.1 were shifted by +0.1 and +0.2, respectively.