Interesting science. Seems blue light is good during the day, not so at night.
"Cain’s research has also found that people who get more light during the day and less at night are less likely to suffer from mental health issues, including depression, anxiety, psychosis and self-harm.
"The brightness matters, but so does the blueness.
"That is because the cells in our eyes are more sensitive to blue light, which may be an evolutionary adaptation from life’s origins in the ocean. Blue light can penetrate deeper into the water than other wavelengths of light.
"Despite a market worth hundreds of millions of dollars for blue light 'protection', blue light exposure works better for improving mood, and animal studies suggest it suppresses the activity in a part of the brain called the habenula, which is linked to depression."
#light #science https://www.smh.com.au/lifestyle/health-and-wellness/the-surprising-type-of-light-that-can-change-the-way-we-feel-20250306-p5lhcb.html