Lantern

The Lantern, also known as the Lamp or the Flame Lantern, is a reappearing item in the Legend of Zelda series, which typically serves the purpose of illuminating dark areas and lighting unlit torches at the expense of steady consumption of its fuel, such as magic or Lantern Oil, until the energy source is completely depleted, whereby the lantern ceases to work. In games where the lantern is not featured, Fire Arrows, a Fire Rod, or Ember Seeds replace its use.

The Legend of Zelda: A Link to the Past
In A Link to the Past, the Lamp is potentially the first item Link can receive. It can be found inside chest inside his house. However, if he misses the chest, it can be found inside Hyrule Castle. Powered by his Magic Meter, the lamp serves the epitome of its use by brightening dim areas and igniting any unlit torch with fire.

The Legend of Zelda: The Minish Cap
Known as the Flame Lantern in The Minish Cap, the lantern is found in the Temple of Droplets and introduces the ability to melt ice. The lantern is essential in the battle against the Big Octorok. It is also the most effective item for cutting fields of grass. However, the lantern has little use outside of the Temple of Droplets.

The Legend of Zelda: Twilight Princess
In Twilight Princess, Coro gives the Lantern as a gift to Link when they first meet. This Lantern is fueled by Lantern Oil, which can be purchased or found in certain areas. The lantern is vital for perception in dark passageways, burning cobwebs blocking entrances, igniting torches to open doors or to summon chests, and also ridding areas of fog. It can also be used to keep the small insects in Arbiter's Grounds from jumping on to Link.