  Total solar eclipses (TSEs) offer a good opportunity to look for photons
produced in possible radiative decays of solar neutrinos. In this paper we
briefly review the physics bases of such searches as well as the existing
limits on the neutrino proper lifetimes obtained by such experiments. We the
report on the observations performed in occasion of the 29 March 2006 TSE, from
Waw an Namos, Libya.
