As Fig. 14, but the flux is now shown on a logarithmic scale. On this scale the variation of the fluxes in the range above the He ii ionization edge with metallicity is verified. For a metallicity of 0.05 Z_⊙, there is a considerably stronger flux of these photons than for the models with Z_⊙. Because of the larger He abundance, the model at the bottom shows less emission in the He ii-ionizing part of the spectrum.