Equivalent widths (W_λ) of Lyα at 1240 Å (first column, second row of Fig. 16). All the symbols as in Fig. 16. Additionally, the green symbols show the case B SED results (pink symbols) corrected using our formula (first order correction; only the enhancement in the line flux is taken into account, there is no correction for the continuum). The difference coming from not correcting for the nebular continuum enhancement is visible for the hottest model.