Är en lightaber hilt resizable?

Vad du refererar till är faktiskt en " A99 aquata breather ". I kanon beskrivs dessa som en " Jedi-andningsapparat " .

Den officiella Star Wars-databasen har en artikel om dem:

A small breather that fits snugly into a Jedi Knight's utility belt, the A99 aquata breather is a compact mouthpiece designed to supply its wearer with a breathable gas. The A99 has advanced filters to allow it to function underwater, in a vacuum, and in certain poisonous environments. The A99 has a number of variants to accommodate a variety of alien physiologies. The A99's miniature compressed air tanks can supply two hours of oxygen.

Som du kan se från bilderna nedan, har Obi-Wan fortfarande definitivt sin lampa.

Ochhärtittarnärmarepåenheten:

Och den aktuella pluggen som används på skärmen av Qui-Gon (från Lucasfilm Archive utställning )

Ochfrån Phantom Menace novellisation :

The Gungan pointed at the lake. “We go underwater, okeday?”

The Jedi looked at each other, then extracted small containers from their clothing, releasing portable breathing devices the size of the palms of their hands.

“Me warning yous.” Jar Jar’s eyes shifted from one to the other. “Gungans no like yous outlanders. Yous not gonna get warm welcome.”

och Revenge of the Sith novelisation , vilket specifikt bekräftar att belysningsremmar verkligen fungerar undervattens: -)

...he was vaguely pleased to discover that even in his semiconscious fall, he’d managed to hang on to his lightsaber.

He clipped it back to his belt by feel, and-using only a minor exercise of Jedi discipline to suppress convulsive coughing-he contracted his diaphragm, forcing as much water from his lungs as he could. He took from his equipment belt his rebreather, and a small compressed-air canister intended for use in an emergency, when the breathable environment was not adequate to sustain his life.

Obi-Wan was fairly certain that his current situation qualified as an emergency.

Intressant är originalkonceptet var att i stället för en andningsapparat skulle Jedi sätta maneter på sina ansikten (!);

U.K. Concept Artist Kun Chang helped develop the look of the aquata breathers. "One idea for the breathers that everyone loved -- but ultimately wasn't used -- was that Obi-Wan and Qui-Gon were going to pick up a kind of jellyfish and place it over their faces which would enable them to breathe underwater," reveals Kun.

Det var inte lightaber som var i deras munnar ... det var en Jedi-andningsapparat , något som liknar den som ses i James Bond 007-filmen Thunderball :