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healthy-living

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Sleeping with the light on could lead to worse Zzs, a small new study suggests.

Reuters first reported on the study, published in the journal Sleep Medicine, which showed that sleeping with the lights on is linked with waking up more often in the middle of the night and having more shallow sleep. Plus, it seems to affect brain oscillations that are linked with sleep depth.

Ten study participants with healthy sleep patterns underwent two sleep sessions where they were monitored using polysomnography. In one of the sessions, they slept with the lights on, and in the other, they slept with the lights off. Reuters reported that the light came from a fluorescent lamp just a few feet away from the participants.

The South Korean researchers found that when the participants slept with the lights on, they had more shallow, stage 1 sleep and less slow-wave sleep, as well as increases in arousal during sleep. There were also changes to brain oscillations, “especially those implicated in sleep depth and stability,” they wrote in the study.

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light sleep

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