  We present a parametric estimate of photon production at early times in
heavy-ion collisions based on a consistent weak coupling thermalization
scenario. We quantify the contribution of the off-equilibrium Glasma phase
relative to that of a thermalized Quark-Gluon Plasma. Taking into account the
constraints from charged hadron multiplicity data, the Glasma contribution is
found to be significant especially for large values of the saturation scale.
