en_tn/jhn/12/36.md

While you have the light, believe in the light so that you may be sons of light

The "light" is a metaphor for the teachings of Jesus which reveal the truth of God. "sons of light" is a metaphor for those who accept the message of Jesus and live according to God's truth. Alternate translation: "While I am with you, believe what I teach so that God's truth will be in you" (See: rc://en/ta/man/jit/figs-metaphor)