Strong’s Greek
G5458 — phoster
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
φωστήρ
phoster — pronounced foce-tare'
from 5457; an illuminator, i.e. (concretely) a luminary, or (abstractly) brilliancy:--light. see GREEK for 5457
2 occurrences in the KJV.
Philippians 2:15
That ye may be blameless and harmless, the sons of God, without rebuke, in the midst of a crooked and perverse nation, among whom ye shine as lights in the world;
Revelation 21:11
Having the glory of God: and her light was like unto a stone most precious, even like a jasper stone, clear as crystal;