Light World
From Zelda Wiki, the Zelda encyclopedia
The World of Light or Light World is a term used to describe all lands opposite of the Dark World, Twilight Realm, and Siren World such as Hyrule, Holodrum, Labrynna, Skyloft and other lands. As its name suggests, it is a land that basks in the light of day, as opposed to the Dark World (little light), or Twilight Realm (light similar to that of the sunset). In Twilight Princess}} for example, Hyrule is the light world whereas the Twilight Realm is the opposing land which has vey little sunlight
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Eventually, most came to call it the Twilight Realm, and from it, none could return to the world of light...
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In order to save this half of the world, the Light World, you must win back the Golden Power.
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— Sahasrahla, describing Link's mission in A Link to the Past
The Light World is not to be confused with the Sacred Realm or the Temple of Light.