Psalms 136:7-9 - Joseph Benson’s Commentary on the Old and New Testaments

To him that made great lights, &c. Great luminaries, placed in the firmament of heaven, to shed their light and influences upon the earth: see notes on Genesis 1:14-16. “Light is the life and soul of the universe, the noblest emblem of the power and glory of God, who, even in the night season, leaves not himself without witness, but gives us some portion of that light reflected, which by day we behold flowing from its great fountain in the heart of heaven.”