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.
Galen Marek was another Force-user who could channel lightning that would kill on contact. Both Kyle Katarn and Darth Sidious could conjure lightning so powerful that not only would it instantly kill its target, it would also physically hurl them backwards.
Darth Maul was also strong in the Force, strong enough for Darth Sidious to raise and train him as a Sith Lord. Maul was able to use Force Choke and Force aided acrobatics.
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.
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.
Why Darth Maul Never Used Force Lightning - Star Wars Explained
Could Vader use Sith Lightning?
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 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.
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.
6 Darth Maul — he does not hesitate to taunt people & cause them intentional harm with his force choke. While most have used the Force choke as a means to warn someone, to dominate them, and tell them to follow their orders, others like Darth Maul have used the action to taunt people and to cause them intentional harm.
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.
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.
Having trained in the ways of the Force, Darth Maul was a formidable warrior strong with the dark side and possessed deadly skills in lightsaber combat. In addition, he was a scheming mastermind who plotted his return to power despite losing his place in the ranks of the Sith.
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.
While on the floor of the Senate, looking up at the cackling Emperor above him, Yoda clearly realized that he couldn't beat Palpatine in one-on-one combat. As considerable as his own power in the Force was, Palpatine's at that moment was even greater, and to continue fighting would likely only result in his demise.
Yep. Darth Maul didn't really say or show straight up that he "feared" Darth Vader, but he openly stated his belief that he could not defeat Darth Vader without the help of the Jedi, therefore on his own.
Regardless, based on the season 7 of The Clone Wars, and the fact that Darth Maul was aware of Anakin Skywalker's future and his role as the Chosen One, it is very likely that Darth Maul indeed feared Darth Vader to some extent, and preferred to avoid a direct confrontation with him, at least, on his own.
When Maul regained his composure he was able to Force-push Obi-Wan into a melting pit, where he held on for dear life. Calming himself, Obi-Wan leaped over Maul and used Qui-Gon's lightsaber to sever Maul in two.
Sidious may have given Dooku the title of Darth Tyranus, but because the Jedi Order knew him as Count Dooku, greatly preferring to not indulge his role as a Sith, they continued to call him by that name.
Sith eyes really only appear in those actively giving themselves up to the dark side. Palpatine is regularly seen without them, and Dooku seems to be a rather composed individual, given his alignment. It seems they're not permanent physical changes.
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.
Yes he does enjoy the fight and is more aggressive with the form, but at no point does he actually use the dark side. The thing about Vapaad is that Mace uses himself as a conduit to redirect his opponent's dark side power back at them. So he isn't drawing on the dark side or using it himself.
However, in multiple stances in Canon and Legends we see Sith becoming Force ghosts in everything but name. Bane, Revan, Nihilus, Sidious, Momin, all showed the capability to keep their soul alive like the Jedi do and communicate with the living.
Force lightning can be deflected and absorbed by a lightsaber, and select Jedi have proved able to neutralize the technique through the power of the light side.
