VIS and NIR spectral lines. Models 1401 (blue line), 1401a (orange dashed line), 1401b (purple dashed-dotted line), and 1401c (red dashed-double-dotted line) vs. observations (black dotted line). Left. Visible range: transitions 6320.72 Å compared to Kitt Peak Solar Atlas (KP-FTS) (Hase et al. 2010) intensity observations. Changes due to a higher number of levels (models 1401b and 1401c) are clearly visible. Right. NIR range: transitions 10 964.38 Å show improvements due to changes in the broadening data (not included in model 1401) and the increment in the number of energy levels (models 1401b and 1401c).