You are the light of the world. A city built on a hill cannot be hid. No one after lighting a lamp puts it under the bushel basket, but on the lampstand, and it gives light to all in the house. In the same way, let your light shine before others, so that they may see your good works and give glory to your Father in heaven. Matthew 5:14-16
Yes, we are the light.
But notice the next verse - a light is lit and then placed, it doesn't ignite itself or select its location. We are "the light" because we've been lit up and placed in particular settings. It's not our own doing.
Our good works are not the light; they are illuminated by the light of God ignited within us. When our light is lit up and set in the right place, our works become visible as God's own.
And even if our gospel is veiled, it is veiled only to those who are perishing. In their case the god of this world has blinded the minds of the unbelievers, to keep them from seeing the light of the gospel of the glory of Christ, who is the image of God. For what we proclaim is not ourselves, but Jesus Christ as Lord, with ourselves as your servants for Jesus' sake. For God, who said, “Let light shine out of darkness,” has shone in our hearts to give the light of the knowledge of the glory of God in the face of Jesus Christ. II Corinthians 4:3-6