As the light — Pure, clear as the sun, but much more dazzling. His hand — The face of Moses shined; the face, yea, hands of our God, shine with glorious light. There — In that light wherewith he appeared. The hiding — Which discovered much of it, but hid much more; it was light inaccessible.
Related Commentaries of Habakkuk 3:4
4 And his brightness was as the light; he had hornsc coming out of his hand: and there was the hiding of his power.