Ukukhanya kwasebusuku okuzwa ilanga kuyisitayela futhi kubukeka njengelanga eliphumayo, kukhanyisa ukufudumala komndeni; kunezinhlobo ezintathu zokulawula ukukhanya, isilawuli somsindo nesibani, nesilawuli kude;
uhlobo lokulawula ukukhanya: lapho ukukhanya kubuthakathaka, ukukhanya kwasebusuku kuzovuleka ngokuzenzakalelayo , Uma ukukhanya kunamandla, kungena ngokuzenzakalelayo kumodi yokulinda.
Uhlobo lokulawula umsindo nokukhanya: Uma isibani sibuthakathaka, ukukhanya kwasebusuku kuzokhanya ngokuzenzakalelayo lapho umthombo womsindo ungaphezu kwama-decibel angu-60, futhi kungene ngokuzenzakalelayo imodi yokulinda ngemva kwamasekhondi angu-60.
Uhlobo lwesilawuli kude: Ukufiphalisa okungenasinyathelo kanye nemizuzu eyi-10, imizuzu engama-30, kanye nemizuzu engama-60 yokusebenza kwesikhathi kungenziwa ngesilawuli kude. Ngesikhathi esifanayo, iphinde ibe nomsebenzi wokulawula ukukhanya ukuvimbela isilawuli kude ukuthi singalahleki noma sonakaliswe ukuze sithinte ukusetshenziswa kwesibani.