  The $ spin $ $ light$ $ of $ $neutrino $ ($SL\nu$) is a phenomenon of
electromagnetic radiation by a massive neutrino moving in external media that
is originated owing to neutrino magnetic moment. In this short paper we note on
the importance of this effect in the light of its connection with the neutrino
magnetic moment, recap its basic properties in dense matter and give some
general criteria for its best efficiency in nature. On this basis we propose a
set of possible astrophysical environments where the $SL\nu$ can be manifested
in principle.
