The first painting is of a person in prayer/spending time with God, and the light is the presence of the spirit in response. The person is painted on MDF and seporated from the wall by 2-4 blocks of wood, giving a great lighting effect!
The second image kinda speaks for itself. Allthough the letters are pre-cut MDF as well, for that nice 3-D effect. And the grapes are made from jewels [because the fruits are God's gifts, so what better to use than precious jewels!]
The third pic [My favourite!] is of a person worshiping God, and the light represents the closeness this brings us toward God.