Bad Impact Of Sleep With Lights For Body Health

Illustration of sleep (Pexels/RDNE Stock Project)

JAKARTA - For some people, sleeping with lights at night feels safer and more comfortable. In fact, this habit can actually have a bad impact on the health of the body.

Sleep should be a time for energy recovery and balancing the body's function, but light light can damage the process. If it is done regularly, it can have an impact on health as follows.

1. Bad sleep quality

Quoted from the Mayo Clinic, on Monday, September 15, 2025, sleeping with lights on makes sleep quality decrease drastically. Manusa's body has a natural mechanism to rest more in a completely dark room.

When artificial light comes, the body will find it difficult to enter the deep sleep phase, which is important for muscle and brain recovery. This will worsen sleep quality, as it can cause a person to wake up more often at night without realizing it.

2. Increase the risk of obesity

Another bad impact of sleeping with lights on is increasing the risk of obesity. Light while sleeping interferes with circadiant rhythms related to hunger hormone regulations such as leptin and ghrelin, so the body tends to more easily experience weight gain.

3. The risk of cancer increases

Exposure to light at night can also increase the risk of cancer. Research published in the Journal of the National Cancel Institute shows that women who are often exposed to light while sleeping have a higher risk of breast cancer.

This happens because the hormone melatonin, which should work as a natural antioxidant, is suppressed in production when exposed to light, so that it is possible for cancer cells to develop higher.

4. Damage to heart and metabolic functions

Exposure to light during sleep can directly affect the health of the body's heart and metabolism. In a study from Northwestern Medicine, researchers found that sleeping with moderate light can increase heart rate as well as disrupt blood sugar regulation the next day.

With just one night of sleep being exposed to light light light, it is enough to make it more difficult for the body to process glucose properly, so that there is a risk of heart disease and diabetes in the future.