Electric Judgment

Electric Judgment was a Force technique used by Jedi such as Plo Koon, and possibly Luke Skywalker.

Overview
It showed up as yellow or green energy instead of blue or white, but otherwise it was very similar in both appearance and usage to the Force power known as Force lightning. This power was uncommon and controversial among the Jedi because of its intrinsic association with anger and aggression.

During a mission to capture the criminal known as Dreed Pommel, Plo Koon confronted him at a suite in city of Ektra, Metellos. Pommel had taken a young girl hostage and killed her entire family. During this encounter, Koon let out a barrage of lightning at Pommel's head and then a second burst of lightning that knocked him unconscious.

He reported to the Jedi Council of this incident, and stated that he had not felt any anger or fear as he let out the blast Force lightning and was indeed calm and in control of his emotions. The Council asked him to contemplate whether he felt it was wrong of him to have utilized its power during the mission and whether he would use it again.

After much meditation, Koon concluded that it would be wrong of him to ignore its power and that he should develop it into a useful technique. As requested by the Council, he recorded his experiences with the Force lightning that he dubbed "Electric Judgment" on the Great Holocron.

Anakin Solo possibly used this when he was consumed by the light side of the Force just before his death, with streams of energy flowing from his limbs into his enemies. Jacen Solo also used this power against Yuuzhan Vong Warriors at the Battle of Ebaq 9. It was believed that Grand Master Luke Skywalker used this power, or a variation of it, aboard Shimrra's Citadel during the battle against Shimrra Jamaane in an attempt to save his niece and nephew from the Slayers; his powerful version sent green sparks coruscating over the body of a Slayer, instantly killing him and causing his body to convulse.

Behind the scenes
This power, in the New Jedi Order series, was referred to as "emerald fire." Luke probably was able to use this power because of his long years of meditation on the light side. Jacen said very clearly that it did not kill enemies, but it sapped their strength and willpower.

Appearances

 * Episode I: Jedi Power Battles
 * Star by Star
 * Destiny's Way
 * The Unifying Force
 * Dark Nest III: The Swarm War