Sol

In Twilight Princess, a Sol (the word for "Sun" in Portuguese, Catalan, Spanish, Icelandic, Danish, Norwegian and Swedish) is an object that lights the Twilight Realm, similar to the sun of the World of Light. It is made of pure power and provides energy and life to the citizens of the Twilight Realm. The light of the Sols, later in the game, fuses with the Master Sword to create a "Light Sword." .