Аннотация:The spin light of neutrino (SLn ) is a phenomenon of electromagnetic radiation by a massiveneutrino moving in external media that is originated owing to neutrino magnetic moment. In thisshort paper we note on the importance of this effect in the light of its connection with the neutrinomagnetic moment, recap its basic properties in dense matter and give some general criteria for itsbest efficiency in nature. On this basis we propose a set of possible astrophysical environmentswhere the SLn can be manifested in principle.