OET interlinear 2 SAM 22:29

uW Translation Notes:

Note 1 topic: figures-of-speech / metaphor

אַתָּ֥ה נֵירִ֖⁠י יְהוָ֑ה וַ⁠יהוָ֖ה יַגִּ֥יהַּ חָשְׁכִּֽ⁠י

(Some words not found in UHB: that/for/because/then/when you(ms) lamp_of,[are]_my YHWH and,Yahweh lightens darkness_of,my )

Here David is speaking as if Yahweh were actually a lamp that gives him light in his darkness. This image is rich in meaning. Among the meanings that come out in this context is that Yahweh helps him understand what he should do when he would otherwise be confused or uncertain. If it would be helpful in your language, you could state the meaning plainly. Alternate translation: [you enable me to recognize what I should do when I could not understand that myself]