The article continues the discussion of effects occurring in the polymer threads with the metallic fractal clusters (see Photonics Russia. 2025;19(1):14–27. DOI: 10.22184/1993‑7296.FRos.2025.19.1.14.27) and considers the features of capturing external radiation with a wavelength λ in the optical wavelength range by the fractal clusters made of spherical metal particles with the radius R. An explanation is given to the effect generation conditions titled “photon localization” when the condition R << λ is met.