nˈɑːnfˌoʊɾoʊkˈɛmɪkəl kwˈɛntʃɪŋ ɪz ɐ pɹətˈɛkʃən mˈɛkənˌɪzəm ɪn fˌoʊɾoʊsɪnθˈɛɾɪk ˈɔːɹɡənˌɪzəmz æz ðeɪ hæv tʊ ɐvˈɔɪd ðɪ ædvˈɜːs ɪfˈɛkt ʌv ɛksˈɛs lˈaɪt.
Non-photochemical quenching is a protection mechanism in photosynthetic organisms as they have to avoid the adverse effect of excess light.