  By comparing photon diffusion time with gas outflow time, I argue that a
large fraction of the energy carried by the jets during the grazing envelope
evolution (GEE) might end in radiation, hence leading to an intermediate
luminosity optical transient (ILOT). In the GEE a companion orbiting near the
outskirts of the larger primary star accretes mass through an accretion disk,
and launches jets that efficiently remove the envelope gas from the vicinity of
the secondary star. In cases of high mass accretion rates onto the stellar
companion the energy carried by the jets surpass the recombination energy from
the ejected mass, and when the primary star is a giant this energy surpasses
also the gravitational binding energy of the binary system. Some future ILOTs
of giant stars might be better explained by the GEE than by merger and common
envelope evolution without jets.

Solar and Stellar Astrophysics