  We discuss the role of running coupling on the thermal photon yield from
quark gluon plasma. It is shown that the photon production rate from the
partonic phase is considerably enhanced when running coupling is considered
with respect to a fixed value. However, we show by explicit evaluation that
although this difference survives the space-time evolution the experimental
data cannot distinguish between the two once the hard contribution, which is an
essential component of photon production mechanism, is added.
