  The inclusive production rates and differential cross-sections of photons and
mesons with a final state containing photons have been measured with the OPAL
detector at LEP. The light mesons covered by the measurements are the \pi^0,
\eta, \rho(770)+-, \omega(782), \eta'(958) and a_0(980)+-. The particle
multiplicities per hadronic Z^0 decay, extrapolated to the full energy range,
are:
  <n_\gamma> = 20.97 +/- 0.02 +/- 1.15,
  <n_\pi^0> = 9.55 +/- 0.06 +/- 0.75,
  <n_\eta> = 0.97 +/- 0.03 +/- 0.11,
  <n_\rho^+-> = 2.40 +/- 0.06 +/- 0.43,
  <n_\omega> = 1.04 +/- 0.04 +/- 0.14,
  <n_\eta> = 0.14 +/- 0.01 +/- 0.02,
  <n_a_0+-> = 0.27 +/- 0.04 +/- 0.10.
  where the first errors are statistical and the second systematic. In general,
the results are in agreement with the predictions of the JETSET and HERWIG
Monte Carlo models.
