You only have it in the twilight world so whenever you are in the twilight world you have the light sword.
somewhere
Light arrows were not placed in Link's possession in The Legend of Zelda: Twilight Princess because light arrows were not essential in Link's fight against Ganondorf.
The light spirets mark them with dots on your map.
You do not get Light Arrows or Magic Power in Twilight Princess, so this would be a no.
It leads to the Twilight world of Hyrule where the spirit of each province has their light stolen and Link must go through the wall to get the tears of light back to the spirit.
steal or buy some from trill, buy some from coro, i guess at any store
You cannot 'lose' a Tear of Light. If you neglect to pick it up, it will remain marked on the map until you do so.
You kill them
In "The Legend of Zelda: Twilight Princess," the last two Tears of Light are found in the Lanayru Province. One is located in the Lanayru Wetlands, near a group of enemies, while the other is in the Lanayru Gorge, where you must defeat the enemies to collect the tear. After collecting all tears in Lanayru, the Light Spirit, Lanayru, will appear to grant you a new ability.
Zelda is the princess of Hyrule in the Legend of Zelda games. She has the Triforce of her hand, representing wisdom, in other words, she's very wise. Zelda is one of the three people who possess the Triforce. The other two are Link and Ganondorf. In some games, like in The Minish Cap, Zelda possesses an unusual power called the Light Force. It protects her from harm and such. In other games, like Twilight Princess, Zelda can obtain a Light Bow from the Light Spirits in every province in Hyrule. She uses that bow to help Link destroy Ganondorf. And there are so many other games in which Zelda has other powers.....
Because only zelda has the power too sense link has twilight power in him also explains him being a wolf.
As far as I know. But if I'm correct, Zelda's the one who uses them at the end?