EIC light curves (thick) at 100 GeV, calculated with different assumptions on E ^b and Γ _LP. For comparison, SSC light curves (thin) are also shown. The source redshift is set to z = 0.3. For the solid curves, the used parameter set is the same as that in the caption of Figure 3. The dashed curves are for rather than E′ ^b = const. The dotted curves are for α _st = 2.8 rather than α _st = 1.5. The dot-dashed curves are for the case with the evolving E′ ^b and α _st = 2.8. The attenuation by pair creation both inside and outside the source is taken into account.