  We estimate the total predicted Lyc emission rates of OB associations for
which the complete census of O star spectral types exists. The results are
compared to the observed H-alpha luminosities of the host H II regions. We find
evidence for substantial leakage of ionizing photons from some H II regions,
while others appear to be radiation bounded. We estimate that overall for the
LMC, 0-51% of the ionizing radiation escapes the local nebulae, and would be
available to ionize the diffuse, warm, ionized medium (WIM) in that galaxy.
This range of values is consistent with the observed 35% fraction of \Ha\
luminosity emitted by the WIM in the LMC, as well as the corresponding
fractions observed in other nearby galaxies. It is therefore possible that
photoionization by O stars is indeed the dominant ionization mechanism for the
WIM.
