Lincoln H. Blumell and Jan J. Martin explain a translator anachronism in the KJV Bible.
Lincoln H. Blumell and Jan J. Martin, "The King James Translation of the New Testament," in New Testament History, Culture, and Society: A Background to the Texts of the New Testament, ed. Lincoln H. Blumell (Religious Studies Center, Brigham Young University; Salt Lake City: Deseret Book, 2019), 682
In these passages the Greek word is λύχνος (luchnos), which has the literal meaning “lamp.” Here Jesus is not talking about candles, which would be anachronistic, but about oil lamps.