sˌoʊ æt nˈaɪt, ɪt ɹᵻdˈuːsᵻz pˈaʊɚ tə fˈaɪvhˈʌndɹɪd wˈɑːts tʊ ɐvˈɔɪd ˌɪntəfˈɪɹəns wɪð klˈæs ɐ stˈeɪʃənz kˌeɪwˌaɪdˈʌbəljˌuː fɪlɐdˈɛlfiə ænd zˈiːp mˈɛksɪkˌoʊ sˈɪɾi.
So at night, it reduces power to 500 watts to avoid interference with Class A stations KYW Philadelphia and XEEP Mexico City.