Psalms 18:28 - Ellicott's Commentary On The Whole Bible

For thou wilt. — Better, Thou makest bright my lamp. In Samuel, “It is thou Jehovah who art my lamp.” This obvious metaphor is common in Hebrew, as in all literature. Light is an emblem of prosperity, happiness, or life itself. (Comp. Job 18:6; Job 21:17; Proverbs 13:9, &c). It happens to be used very frequently of David and his family (1 Kings 11:36; 1 Kings 15:4; 2 Kings 8:19). Comp. Psalms 132:17.