A wall of light was an immense manifestation of potentially destructive light side Force energy created by the focused power of a united Jedi front. When performed successfully, a wall of light allowed participants to effectively contain or purge the power of the dark side from a specific location, or sever an especially dangerous darksider from their Force connection. The ability was popular among Great Sith War–era members of the Jedi Order, who used it to great effect against the resurgent Dark Lords of Exar Kun's Sith Brotherhood, and later against the spirit of Kun, by the inaugural class of Luke Skywalker's Jedi Praxeum.