The Salt Lake Temple Sun Stones

The sun stones on the Salt Lake Temple are located along the top of each pilaster, and on the East and West towers. They are placed directly above the Earth and Moon Stones.
The sun stones symbolize the Celestial Kingdom, which is the highest of the Three Kingdoms of Glory. In LDS theology, the Celestial Kingdom is the Kingdom where God The Father and Jesus Christ resides. It is the kingdom that faithful Latter-day Saints hope to attain. The teachings and covenants made with God within the temple, including baptisms, endowments and sealings/eternal marriages, prepare men and women to be able to enter the Celestial Kingdom and live with Heavenly Father, Jesus Christ and our families for all eternity.
The rays of light on the stones symbolize God's glory, His light, His truth and His knowledge being shared with us. It also symbolizes Jesus being the Light of the world.