  A large fraction of stars form within young embedded clusters, and these
environments produce a substantial ultraviolet (UV) background radiation field,
which can provide feedback on the star formation process. To assess the
possible effects of young stellar clusters on the formation of their
constituent stars and planets, this paper constructs the expected radiation
fields produced by these clusters. We include both the observed distribution of
cluster sizes $N$ in the solar neighborhood and an extended distribution that
includes clusters with larger $N$. The paper presents distributions of the FUV
and EUV luminosities for clusters with given stellar membership $N$,
distributions of FUV and EUV luminosity convolved over the expected
distribution of cluster sizes $N$, and the corresponding distributions of FUV
and EUV fluxes. These flux distributions are calculated both with and without
the effects of extinction. Finally, we consider the effects of variations in
the stellar initial mass function on these radiation fields. Taken together,
these results specify the distributions of radiation environments that forming
solar systems are expected to experience.
