The New Liturgical Movement has a post on a video produced by Fr. Lawrence Lew, O.P., showing the closing prayers and antiphons after Compline at the Dominican House of Studies. The friars came from around the US, and represented all four Provinces. The occasion for their being together in Washington was the arrival of Pope Francis on his recent visit to the United States. In the video, they chant the "Sub tuum" in English and then "O lumen ecclesiae" in Latin.
It is wonderful to see these young friars continuing the tradition of chanting this beautiful antiphon!