Abbott-Smith Manual Greek Lexicon
φέγγος (G5338)
2 φέγγος , -ους, τό [in LXX chiefly for נֹגַהּ ;] light, brightness , usually c. gen. of something that shines or reflects: of the moon, Mt 24:29 , Mk 13:24 ; of a lamp, Lk 11:33 (WH, RV, φῶς ).† SYN. : αὐγή , q.v.
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain