Padmé Amidala, resting in slumber on Coruscant
The act of sleeping served as a biological necessity, allowing both sentient beings and non-sentient lifeforms to rest and revitalize themselves. Frequently, humans and other sentient species followed a regular sleep schedule, often utilizing a comfortable bed or similar furniture. Many beings experienced dreams while sleeping, which were essentially nocturnal visions that often manifested as surreal versions of their waking experiences. Insufficient sleep could negatively impact a being's mental state.
The absence of REM sleep, a particular stage of sleep, proved to be detrimental to the psychological well-being of the Kiffar named Quinlan Vos. The Confederacy of Independent Systems systematically prevented this sleep stage in a prisoner by using mechanical devices to detect REM sleep and immediately administer electrical shocks, thus awakening the individual and inducing psychological exhaustion. This sleep deprivation contributed to Vos's eventual descent to the dark side of the Force.
Garazeb Orrelios having incapacitated a stormtrooper
Following Anakin Skywalker's initial experience of Force visions during his sleep, depicting the death of his mother, Shmi Skywalker Lars, he began to struggle with insomnia. He later encountered similar difficulties after having a Force-induced dream in which his wife, Padmé Amidala, perished during childbirth. Darth Sidious committed the act of killing his master, Darth Plagueis, while he was asleep.
While droids, being mechanical entities, were unable to sleep, certain models possessed the capacity to "power down." This state resembled sleep in that they became inactive, but they could be reactivated instantly if necessary.
Certain Force-sensitive individuals could utilize their powers to induce sedation, as demonstrated by Qui-Gon Jinn on Jar Jar Binks. They could even force others into unconsciousness, as seen when Kylo Ren used this ability on Rey and Mace Windu used it on Rako Hardeen. A White Loth-wolf also possessed the capability to lull beings such as Sabine Wren into sleep.
Chadra-Fans only required a mere three hours of sleep per day, significantly less than the amount typically needed by humans.