We determined the yields of fission products in the photon-induced fission for ²³²Th and ²³⁸U with an end-point energy of 10 MeV at the electron linac of the Electron Beam Center in Kharghar, Navi Mumbai, India, and those for ^natPb, ²⁰⁹Bi, and ²³²Th with 45-80 MeV and 2.5 GeV at the Pohang Accelerator Laboratory in Pohang, Korea. The peak-to-valley (P/V) ratio, average light mass (<A_L>), and average heavy mass (<A_H>) at different excitation energies were obtained from the mass yield data of this work and literature data. The values of P/V, <A_L>, and <A_H> for ²³²Th(γ, f) and ²³⁸U(γ, f) are compared with similar data for ²³²Th(γ, f), and ²³⁸U(γ, f) to examine the role of the excitation energy in nuclear structure effects. Similarly, the present data for ^natPb(γ, f) and ²⁰⁹Bi(γ, f) were compared with the literature data at other bremsstrahlung energies to examine the effect of the excitation energy on the average mass (<A>) and the P/V ratio.