2 Nephi 26 (II)

Nephi defines priest craft as men setting themselves up as a light unto the world, that they may get gain. In revelation, John sees an angel with seven candlesticks in his hand, which represent the seven churches in Asia, and it is made clear that the churches are not the source of the light-merely the bearers of it. However, in Matthew, Christ says to let your light shine before men that they may see your good works and glorify your father in heaven. Does not being the source of light apply to individuals or just to organizations? If to us, are we reflecting the light of Christ when we let our light shine? How do you let your light shine appropriately?