Mental health disorders affect more than one in five Americans, making it a growing concern for researchers. In the world’s largest study on light exposure and mental health, individuals exposed to high amounts of light at night had a 30 percent increased risk of developing depression, as well as a higher likelihood of experiencing psychosis, bipolar disorder, anxiety, PTSD, and self-harm. On the other hand, those exposed to higher amounts of light during the day had a 20 percent lower risk of depression and other conditions.
One possible explanation for this connection is that exposure to light at night can disrupt the body’s internal clock, known as the circadian rhythm. To ensure proper light exposure, individuals are advised to take short walks outside in the morning or at lunchtime, position their workspace near a window to maximize natural light, limit screen time before bed, and adjust device settings to reduce blue light exposure. In cases where sunlight is limited, especially during fall and winter, the use of a bright light box at home may help individuals realign their circadian rhythm.
Researchers have found that exposure to blue light can disrupt sleep patterns in a significant number of cases they examined. By making these adjustments to light exposure, individuals may be able to positively impact their mental health and overall well-being. As more research is conducted on this topic, it is important for individuals to stay informed about how their environment impacts their mental health and make necessary changes to promote optimal wellness.
