Risks of sleeping in dim light

A recent study has shown that exposure to even a small amount of light during sleep, exceeding 3 lux, can negatively affect the shape and function of the heart muscle, thereby increasing the risk of cardiovascular diseases. The findings indicate that this exposure leads to thickening of the heart walls and a decrease in its efficiency in pumping blood, along with a diminished ability to contract and relax, a phenomenon known as "cardiac remodeling." Experts recommend that bedroom lighting levels should not exceed 1 lux to ensure good sleep, as any excess light could cause harmful long-term changes in the structure and function of the heart.

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