Adam Clarke on Ephesians 5:9

For the fruit of the Spirit - Instead of Spirit, Πνευματος, ABD*EFG, the Syriac, Coptic, Sahidic, Ethiopic, Armenian, Vulgate, and Itala, together with several of the fathers, read φωτος, light, which is supposed by most critics to be the true reading, because there is no mention made of the Spirit in any part of the context. As light, Eph 5:8, not only means the Divine influence upon the soul, but also the Gospel, with great propriety it may be said: The fruit of the light, i.e. of the Gospel, is in all goodness, and righteousness, and truth. Goodness, αγαθωσυνῃ, in the principle and disposition; righteousness, δικαιοσυνη, the exercise of that goodness in the whole conduct of life; truth, αληθεια, the director of that principle, and its exercise, to the glorification of God and the good of mankind.