God who said (ho theos ho eipōn). Paraphrase of Gen 1:3.
Who shined (hos elampsen). Like a lamp in the heart (cf. Mat 5:15). Miners carry a lamp on the forehead, Christians carry one in their hearts lit by the Spirit of God.
To give the light (pros phōtismon). For the illumination.
In the face of Jesus Christ (en prosōpōi Iēsou Christou). The Christian who looks on the face of Jesus Christ as Moses looked upon the glory of God will be able to give the illumination of the knowledge of the glory of God. See note on 2Co 2:10 for prosōpon.