|You are the Light of Endless Days|
O Blessèd Lord, Creator God (p. 148) is written by the Benedictine Nuns of Stanbrook Abbey. In the Divine Office (1974) it is sung at Sunday Daytime Prayer (Week 1). The Divine Office recommends the tune: O Mensch Sieh, first published in the Bohemian Brethren's Kirchengesänge of 1566. An alternative tune that can also be used is Holy Sepulchre (Thorne), as featured in the following video.
Alternative Tune: Holy Sepulchre (Thorne)