Cumulative means according to Eq. (14). Left: cumulative mean of the bolometric radiative intensity, Eq. (13). Right: cumulative mean of the bolometric radiative flux, Eq. (12). The solid curves refer to the magnetic models and the dotted curves to the magnetic field-free models. For better visibility, successive pairs of curves are shifted by 0.02 in ordinate direction and the lowermost (red) curves are unshifted and refer to spectral type K8V. The subsequent, shifted curves refer (from bottom to top) to spectral types K2V (green), G2V (gold), and F5V (blue).