  We have studied the spectral characteristics of the Diffuse Ionized Gas in
two irregular galaxies with low metallicities and intermediate Star Formation
Rates: ESO 245-G05 and Gr 8. The [OIII]/Hbeta in these galaxies is higher than
in the DIG of spiral galaxies but not as high as in other irregular galaxies
previously studied, such as IC 10 and NGC 6822. The [NII]/Halpha and
[SII]/Halpha ratios have very small values, indicating the absence of shocks as
the ionization source for this gas. This ionization can be explained in both
galaxies with photon leakage from the HII regions as the only source. The
percentage of photons escaped from the HII regions is small in ESO 245-G05, of
only 35%, but varies from 35% up to 60% in Gr 8. We also investigated if the
differences found between spiral and irregular galaxies in the [OIII]/Hbeta and
the [NII]/Halpha ratio are due to differences in the metal content between
these types of galaxies. Although the number of galaxies studied is not very
large, it can be concluded that the [OIII]/Hbeta is not related with the oxygen
content, while the situation is more ambiguous for the [NII]/Halpha ratio.
