wˌɛn dˈɑːɹkɐdˈæptᵻd fˌoʊɾoʊsˈɪnθəsˌaɪzɪŋ sˈɛlz ɑːɹ ɪlˈuːmᵻnˌeɪɾᵻd wɪð kəntˈɪnjuːəs lˈaɪt, klˌoːɹoʊfˈɪl flʊɹɹˈɛsəns dɪsplˈeɪz kˌæɹɪktɚɹˈɪstɪk tʃˈeɪndʒᵻz ɪn ɪntˈɛnsᵻɾi ɐkˈʌmpəniɪŋ ðɪ ɪndˈʌkʃən ʌv fˌoʊɾoʊsɪnθˈɛɾɪk æktˈɪvᵻɾi.
When dark-adapted photosynthesising cells are illuminated with continuous light, chlorophyll fluorescence displays characteristic changes in intensity accompanying the induction of photosynthetic activity.