Is Darth Vader weak to Lightning? He wouldn't die to any old lightning. Sidious could kill him with it, but sidious has destroyed entire planets before, which is far grander than any lightning Vader has faced otherwise. So anyways, Vader is vulnerable to Sidious' force lightning, but not so much to others.
In addition, Vader's life support systems were not well insulated, and the system's delicate circuitry was vulnerable to the damaging effects of Force lightning. This vulnerability would eventually contribute to his death.
Darth Vader's Insecurities are His Biggest Weaknesses
In the end, virtually all who have made the attempt to use Vader's cybernetic nature against him have ended up dead or defeated. The elite few who have had the upper hand, even before his conversion to mechanical monstrosity, have done so by dominating him mentally.
Anakin is supposedly more powerful than other Sith Lords like Dooku yet he can't use force lighting. Any explanation? He can do it, but it would risk shorting out his life support. Here's an explanation from The Stupendous Wave.
Two easily explainable reasons for why Maul never used Force lightning, which have come up several times, are one) that he wasn't a Sith Lord and two) he never learned the ability in the first place.
Why Darth Vader Never Made His Suit Immune to Force Lightning - Star Wars Explained
Why did KYLO Ren never use Force lightning?
Kylo demonstrably couldn't defeat Snoke directly, instead killing his master via deception. Kylo most likely never learned how to conjure Force lightning, which is considered an advanced skill for dark side users.
As a Sith, Count Dooku's Force lightning is one of the reasons why he's so dangerous, but it's a skill he learned long before he became a Sith. One of the main villains of Star Wars: The Clone Wars, Dooku's lightning is one of his main weapons, much like his master Palpatine.
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.
The way of the Sith may be for the apprentice to kill his master, but there was no way Darth Vader would've ever beaten Emperor Palpatine in a fight prior to Return of the Jedi. Darth Vader's electronic suit is very susceptible to electricity, and Palpatine is known for his uses of Force lightning.
The only Sith Lord who actually killed Vader, Darth Sidious kept his apprentice in line for over two decades. His true advantage was Force lightning, a power which would wreak havoc on the suit keeping him alive.
Age, his suit and his de-limbing lower his strength, but obviously his pain, anger and hate connect him to the dark side and make him more powerful. It's hard to quantify his power at the end without those dark side variables.
Despite being equally as strong in the Force, one innately Sith ability that Jedi in the Star Wars franchise do not wield is Force lightning. First introduced when Darth Sidious (Emperor Palpatine) electrocuted Luke Skywalker in Star Wars: Return of the Jedi, Force lightning is a powerful weapon for Sith.
Given Rey's lineage as Palpatine's granddaughter, it is also reasonable to assume she is already better attuned to using Force Lightning than the average Force user, with Ben telling Rey that she has all of Palpatine's power within her at the beginning of The Rise of Skywalker.
Gray Jedi commonly demonstrated their skills with both Light and Dark side Force capabilities. For example, the capacity to construct a lightsaber from scratch, along with unique Force talents such as Force lightning.
Quinlan Vos described the feeling of being struck by Dooku's lightning as both burning and freezing his limbs. Those who were harmed with Force lightning often writhed in pain with uncontrollable muscle spasms.
Darth Vader learned of this ability through Darth Sidious, and upon his death, the spirits of Kenobi and Yoda completed his training by granting him the last step in becoming a spirit. Anakin's spirit appeared as that of his younger self, prior to his fall to the dark side.
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.
Emperor Palpatine was able to send one storm over thousands of light years from Byss to Coruscant. Before being able to successfully create and control Force storms, a potential user had to be extremely proficient in the ways of the Force, including instinctive astrogation.
The true potential of Force Lightning was demonstrated in Star Wars: The Rise of Skywalker, when Palpatine - his powers enhanced by the Force Dyad he had absorbed into himself - unleashed a storm that almost destroyed the entire Galactic Fleet.
According to Luke Skywalker, there's a sense of progression to this; only the most seasoned and capable Jedi Masters can deflect Force Lightning. This feat is probably all the rarer because Jedi don't normally train for combat against Force Lightning, so it would have to be figured out on the spot.
He tried, but was unprepared for the sheer power of Sidious' blast. It was magnitudes of order more powerful than Dooku's lightning, and it overwhelmed the defenses Yoda tried to throw up against it. Yoda just had no idea it would be so much stronger than what Dooku was able to muster.
Luke didn't need to be warned about force lightning. He had a very different form of training than Jedi just years earlier had. He was trained with self-experience, and that was truely what was best for him.
Generally yes, but they aren't limited to Force lightning. As Senator Palpatine once said, “The Dark Side of the Force is a pathway to many abilities some consider to be unnatural.” If you're simply wondering why Darth Vader didn't use it, it's simply because it would damage his suit.
