  A non-equilibrium plasma was studied using classical electrodynamic field
theory. Non-linear interaction terms contribute to a finite lifetime for the
dressed electrodynamic field. The lifetime exhibits a $\sim n^{-1} T_{e}^{3/2}
T_{i}^{-2}T_{r}^{1/2}$ dependence, where $n$ is the number density, $T_{e}$ is
the electron temperature, $T_{i}$ is the ion temperature, and $T_{r}$ is the
temperature of the radiation field. The resulting width of the plasmon
resonance is shown to decrease as equilibrium is approached. Dynamic screening
leads to opaqueness of the plasma for low energy electromagnetic radiation.
This leads to a quadratic correction to the quartic Stefan-Boltzmann law. We
also briefly discuss the effect of dynamic screening on fusion rates. Solitonic
solutions to our non-linear wave equation allow localization of positive
charges, which may enhance fusion rates.
