This is the psalm for the second Sunday of Lent as set by Paul Mason in Psalms For All Time Vol 2. It is also a Common Psalm for Ordinary time and suitable for anointing and funerals.
The refrain is, “The Lord is my Light and my salvation,” sung twice. The text is Psalm 27: 1,7-9, 13-14 as seen here, or better still buy his book.
This isn’t up on You-Tube nor at Mason’s site, so here is backing for learning purposes.