Top panels: differential EBL photon energy density as a function of distance along the line of sight for various sizes (as indicated by the labels) of a void located at z_v = 0.5 at two representative photon energies of ϵ = 1 eV (left) and ϵ = 8 eV (right). The red solid lines (R = 0) represent the homogeneous case. The general increase of the EBL energy density with redshift is due to the ﹩{(1+{z}_{1})}^{4}﹩ factor in Equation (5) and the increase in star formation rate with redshift. Bottom panels: relative EBL energy density deficit due to the presence of a void for the same cases as in the top panels. The red vertical lines indicate the boundaries of the void for the R = 100 h⁻¹ Mpc case.