Forum: scifi.stackexchange.com
Tags: <star-wars><lightsaber>
Title: Were lightsabers ever used as light sources?
Question: Since lightsabers give off a visible glow, I could see a Jedi or a Sith using their lightsaber as a lighting source. They were already used as tools (at least in Episode I) so there are some non-violent uses to a lightsaber. Has any Jedi or Sith used their lightsaber in this manner in canon works?

Answers:
sents: text: In Star Wars the Clone Wars , Series 2 episode seven, "Legacy Of Terror" Anakin and Obi-Wan use their lightsabers to give off light when they are descending into the catacombs.
text: The Clone Troopers who accompany them use in-built lights on their helmets.
text: http://starwars.wikia.com/wiki/Legacy_of_Terror
answer_details: author: scifi.stackexchange.com/users/46383/Mikasa
score: 16
sents: text: Yes.
text: In the new Disney canon novel "Heir to the Jedi", Luke uses his lightsaber in a tunnel as a light source after some creature ate Luke's lamp.
text: “Stay back!”
text: I warned Drusil as I heard the creature choke and spit up the lamp.
text: It wasn’t working anymore—maybe it was simply in the off position rather than broken, but I wasn’t about to search in the dark for it in the bottom of a sewer with something hungry nearby.
text: We needed to see, so I pulled my lightsaber from my belt and hoped it would give off enough ambient light to spot the creature before it attacked again .
text: Holding it in front of me in a defensive stance, I turned it on as I heard the creature snarl and thrash in the filth.
text: The blue plasma blade bloomed up and my eyes, dilated in the darkness, saw the thing open its mouth and bunch its powerful back legs for a spring at my throat.
answer_details: author: scifi.stackexchange.com/users/976/DVK-on-Ahch-To
score: 14
sents: text: In The Clone Wars: Weapons Factory (S02E06), Barriss Offee and Ashoka Tano use their sabers to provide light when they are trapped beneath some rubble.
text: In the following episode, Legacy of Terror (S02E07), Obi-Wan and Anakin use theirs to provide light as they descend into a temple.
answer_details: author: scifi.stackexchange.com/users/5184/phantom42
score: 8
sents: text: Savage Opress used his lightsaber as a light source in the season 4
text: The Clone Wars episode "Brothers" (episode 21).
answer_details: author: scifi.stackexchange.com/users/46345/Ras Morthil
score: 6
sents: text: Obi-Wan does just that in the Revenge of the Sith novelisation, right after he is attacked by his clone troops.
text: Some undefinable time later, Obi-Wan felt his head and shoulders breach the surface of the lightless ocean.
text: He unclipped his lightsaber and raised it over his head.
text: In its blue glow he could see that he had come up in a large grotto; holding the lightsaber high, he tucked away his rebreather and sidestroked across the current to a rock outcropping that was rugged enough to offer handholds.
text: He pulled himself out of the water.
text: Rey also does it in The Rise of Skywalker , after falling into some sinking sands.
answer_details: author: scifi.stackexchange.com/users/20774/Valorum
score: 3
sents: text: When Luke is being tested by Yoda at the tree of the Dark Side, he lights his saber as he enters the tunnel.
text: I always assumed it was in order to see by its light.
text: This is supported by the official novelization as mentioned by Valorum .
text: He held his glowing sword in front of him and noticed an object on the cave floor.
text: Pointing his lightsaber downward, Luke illuminated a black, shiny beetle the size of his hand.
text: In an instant, the thing scurried up the slimy wall to join a cluster of its mates.
answer_details: author: scifi.stackexchange.com/users/55473/Paul Johnson
score: 1

Summary of the answers:
The lightsaber is used as a light source several times, including in The Clone Wars and in The Rise of Skywalker.
Lightsabers are used as lighting sources in the following: Clone Wars "Legacy of Terror", "Weapons Factory" and "Brothers", as well as in Heir to the Jedi, Revenge of the Sith and the Rise of Skywalker.