Light Beam

Light Beams are present in many Zelda games.

A Link to the Past
Link uses a Light Beam in A Link to the Past to force the shape-shifting boss of Thieves' Town, Blind the Thief, to reveal his true form.

Ocarina of Time
In Ocarina of Time, Light Beams are found in the Spirit Temple and behind the Spirit barrier door in Ganon's Castle. Link uses either movable mirrors he finds in the rooms or, after he finds it, the Mirror Shield to reflect the light onto Sun Switch targets.

The Wind Waker
In The Wind Waker, Light Beams are only found in the Earth Temple, shining through holes in the ceiling. Once Link possesses the Mirror Shield he can bend the light to multiple Mirrors or Light Statues. This light can also cure Link when he is "cursed".

Minish Cap
Light Beams are found in the frozen Temple of Droplets in The Minish Cap, shining through skylights which can be opened and closed. They are used to melt blocks of ice to free their contents, such as keys. After beating one of the temple's three mini-bosses, Link will find the Flame Lantern which will allow him to melt blocks of ice without sunbeams.