ISB ~ 1 Thessalonians 5 v5

sons of light:A Semitic way of saying “sons of goodness, righteousness, and truth” (Eph 5:8-9). The struggle between light and darkness as forces of good and evil is a prominent theme in Jewish tradition (Dead Sea Scrolls) and the NT (Jn 1:4-9; Acts 26:18; Rom 13:12-13; 1 Jn 1:5-7) (CCC 1216).