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.
Effect of Force lightning
It could deform the person being shocked and it could also lead to them being crippled. It was also known to cause brain damage and blindness.
Force lightning is a dark side ability used to torture, disfigure, and even kill one's victims. Blue in color, Sith shoot Force lightning from their hands by calling on their hatred and aggressive feelings. However, while a deadly weapon, it is not unstoppable.
While Jedi could create Force lightning, like Sith, they choose not to use that power due to its association with the dark side and immoral nature. 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.
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.
It's likely Kylo never learned how to summon Force Lightning
From what we learned from the Marvel Comics story on Kylo Ren and his upbringing, along with the information explained and even alluded to in the sequel trilogy — it's entirely likely that Kylo never completely learned how to harness Force lightning.
Perhaps, the old creature simply forgot. Late in the film, Darth Vader does not recognize C-3PO who is in Cloud City with Han Solo, Chewbacca, and Leia. Although C-3PO is not completely assembled in the scene, he is definitely visible to Vader.
Flow-Walking is perhaps one of the most dangerous abilities that a Force user can wield. This rare Force power allows users to view the past and the future. Once Flow-Walking has commenced, those powerful in the Force can even alter some events that transpire, to change the course of the future.
17 Force Light
Only the most powerful of Sith lords can withstand the power of Force Light, making it one of the most powerful Force abilities present in the entire franchise. It can also be used in places plagued by the dark side of the force to either contain or expunge it from the area.
Force lightning, also known as Sith lightning or dark rays, was an offensive power that Force users could conjure through the dark side of the Force.
The color of the bolt depends on how hot it is; the hotter the lightning, the closer the color will be to the end of the spectrum. The color spectrum in this case start with infared which is red and the coolest up to ultraviolet which appears violet and is the hottest.
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.
Red Force Lightning
Due to his strong connection to the dark side, his Force lightning was red, a color that appears to only be able to be manifested by the most powerful individuals.
Through his duels with Darth Sidious and Count Dooku, it was well known that Yoda could absorb and deflect Force lightning with his palms.
Jedi Code forbids Jedi from using Force lightning because to conjure it, one must seek strength that would put them in danger of falling to the Dark Side.
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.
Ysalamiri were lizard-like tree-dwellers about 50 centimeters in length native to the planet Myrkr, most known for their ability to repel the Force by creating a Force-neutral bubble.
A Force scream was an involuntary Force exertion manifested by those whose alignment was with the dark side of the Force. It was a scream, of strong frustration, rage, or grief, emitted through the Force.
Plagueis is the most powerful force-user with the second being Darth Sidious and the third being Yoda. Darth Plagueis created Anakin Skywalker through meditation, and trained Sidious in the dark side using quite a few new methods. He created new ways to use the Force that others had never even thought of.
Yoda recognized R2-D2 during The Empire Strikes Back.
R2-D2 was present when Padmé gave birth to Leia and Luke, so he knew Luke was Anakin's son – but what he didn't know was that Anakin became Darth Vader. In addition to that, Anakin's fall was surely a painful event in R2-D2's life, one that he definitely wouldn't like to remember or even talk about.
However, Leia's strong-mindedness during Vader's probe denied him the opportunity to discover she was his daughter. That serves to justify Vader's lack of awareness of his connection to Leia, although, perhaps, not as satisfyingly as if Lucas had planned for the relationship from the beginning.