Listen to Introit: Lux Fulgebit online. Introit: Lux Fulgebit is an English language song and is sung by St Mary's Schola Cantorum and David J. Hughes. Introit: Lux Fulgebit, from the album Lux Fulgebit: The Mass at Dawn of Christmas Day, was released in the year 2017. The duration of the song is 3:26. Download English songs online from JioSaavn.