Kajeno ho bohlokoa ho sebelisa mehloli e meng ea matla. Ka hona, ha u ntse u tsamaea ka har'a toropo, u kanna oa bona liphanele tsa letsatsi.
Moralo oa sele ea letsatsi o ipapisitse le semiconductor photogenerator e fetolang khanya ea ultraviolet hore e be motlakase. Hajoale, likarolo tsa letsatsi tsa mefuta e mengata e rarahaneng ea mahlale li ntse li ntlafatsoa, li ntlafalitsoe ebile li na le lisebelisoa tse fapaneng.
Batho ba bang ba batlang ho sebelisa matla a mang ba se ba ntse ba kenya liphanele tsa letsatsi marulelong a matlo a batho. Hape, liphanele tsa letsatsi li bonolo ebile li bonolo ho li hlokomela: hlakola bokaholimo feela ka lesela mobu.
Haeba re bua ka mefokolo, joale e ka sehloohong ke hore liphanele tsa letsatsi ha li tumme naheng ea naha ea rona. Mohlomong tšitiso e kholo ke hore sele ea letsatsi e its'etleha ka maemo a leholimo, ka hona batho ba bang ha ba bone molemo oa sesebelisoa sena.
