Some Jedi do not even need a lightsaber to block Force lightning, with Master Yoda catching it in his hands. There is some evidence he absorbed the power of Force lightning into himself, using it to boost his own Force power.
Force lightning could also be absorbed and redirected by a Jedi of sufficient skill; Yoda demonstrated this ability by both deflecting and absorbing the dark power during battles with Darth Sidious and Tyranus, using nothing more than his own two hands.
Darth Vader can not use force lighting, because of his severed arms. Robotic hands can't summon the force lighting. However Darth Vader can still use other forms of the force, such as force choke.
Anakin Skywalker's Chosen One Potential Was Permanently Stunted. The Darth Vader comic book series reveals that, while the eponymous Sith Lord was indeed capable of using Force Lightning, the electricity could potentially destroy his life-sustaining suit.
Although, with the battle against Mace Windu in his office, Palpatine's Force-lightning was reflected back and scarred his face, making it wrinkled and appear far older than he already was.
She and Kylo Ren were both trying to bring the transport to themselves with the Force, and in her anger, she accidentally unleashed lightning upon it, destroying the ship immediately.
Although instead of incapacitating like Plo Koon would, he has used it to instantaneous kill his targets although apparently has only used this against the Yuuzhan Vong. Legends Luke could use Force Lightning although he called it Electric Judgement, but it was Force Lightning all the same.
He was fully in control of the fight when he was blasting Luke. Instead of trying to outright kill his enemy, Palpatine just used enough force lightning to torture him for his entertainment. Not only that, but Luke didn't have to endure it for as long as the Sith Lord.
Why didn't Palpatine just stop his Force lightning when Mace Windu deflected it back at him? It was all part of his manipulation of Anakin and the Senate. He needed Anakin to think Mace Windu was executing a helpless prisoner, and he needed the Senate to see evidence that the Jedi were traitors.
Dooku first used Force lightning at a young age. According to the audiobook, Dooku: Jedi Lost, he was once abducted for a Dark Side ritual, conjuring lightning to kill his captors and escape. Dooku went on to become one of the greatest Jedi masters, but his ability to use lightning was seemingly a natural talent.
Mace Windu, with his lightsaber combat form Vaapad, could reflect the lightning back to its source with a "superconducting loop". It required tremendous effort on the reflector's part, however, as seen in Windu's battle with Palpatine; Windu was seemingly able to overcome Palpatine's lightning.
There are two possible reasons for this; Kylo was never taught the skill or he simply chose not to use it. Rey, on the other hand, struggled with the temptation of the dark side at that moment and was fighting a connection to her grandfather, unbeknownst to her.
Either way, while Vader can use most other Force abilities, Force Lightning needs to be channeled, and Vader's limbs are explicitly not connected to the Force. The Star Wars: Episode III - Revenge of the Sith Visual Dictionary confirms Darth Vader cannot use Force Lightning, and even suggests this is the reason why.
While unleashing the lightning storm, he screams at Vader that it is a Sith's right to revel in the glory of their own strength, and there's nothing that displays the unadulterated, raw power of the Dark Side of the Force than Force Lightning. This explains why Palpatine's default Force-attack is lightning.
Palpatine carried the lightsaber for a great deal of his life afterward, though he only rarely wielded it in combat, as his position as Emperor made battles with other Force-users few and far between, and he preferred to rely on his raw ability with the Force in any case.
Summary. Some dark siders can conceal their appearance with the Force, hiding physical signs of corruption like yellow eyes and aged features. Palpatine's yellow Sith eyes may have been hidden through a dark side illusion, potentially masking his true form from the Jedi.
Typically, Humans had an average lifespan of 100 to 120 standard years. Those who were keenly atuned to the Force, an ubiquitous and binding power that suffused the whole Known Universe, could live up to 200.
In a Vanity Fair interview from 2005, George Lucas went deeper into why Anakin became much weaker as Vader. In the interview, he explained that because Anakin's limbs were severed and replaced by robotics, it was harder for him to use the Force than it was before his battle with Obi-Wan.
It was a technique of telekinesis that was frequently employed by the Sith and other users of the dark side of the Force, although there were some cases where Jedi or other users of the light side would use the technique.
