  We propose a framework that unifies the description of light transport in
three-dimensional amorphous dielectric materials that exhibit both localization
and a photonic bandgap. To this end, we argue that coherent reflection near and
in the bandgap attenuates the generation of diffuse or localized photons. Using
the self-consistent theory of localization and considering the density of
states of photons, we can quantitatively describe all transport regimes:
Transparency, light diffusion, localization, and bandgap. Comparing the model
with numerical data on optical transport in hyperuniform dielectric networks
confirms our findings.
