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Light at night boosts heart disease risk
A study from Tulane University in the United States has found that exposure to excessive light at night increases the risk of cardiovascular diseases. It confirmed that exposure to more than 3 lux of light—equivalent to the brightness of moonlight—is associated with higher risks of heart failure, atrial fibrillation, irregular heartbeats, heart attacks, and strokes, all of which can be life-threatening. The study explained that nighttime lighting affects the production of melatonin, the hormone that regulates sleep, as its production decreases with increasing light levels. This leads to poor sleep quality and heightens the risk of chronic illnesses linked to sleep deprivation, especially heart diseases. It is recommended to dim the lighting in the bedroom, use warm-colored lamps, avoid screens before sleep, and wear sleep masks to improve sleep quality and reduce the risk of heart problems.
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