Negative effects of low doses of blue, green, and white LED light
Researchers exposed albino rats twice a day for 15 days to different LED light sources: blue (450 nm), green (507 nm), white (2700 K), red (620 nm), and a combination of blue and red light.
Pure blue light caused a 76% loss of retinal cells. Standard white LED light with a blue component resulted in a 40% reduction in photoreceptors, while pure green light caused a reduction of as much as 50%.
Improved eye health and retinal protection thanks to the red component
However, the study also points to a potential solution: when researchers added a natural red component to the potentially harmful blue light, retinal cell damage was immediately reduced by 19%. Red light reduced cellular stress and supported the regeneration of eye structures, even though the amount used in the test was four times lower than the amount of blue light.
Although the study was conducted using an animal model, it provides further evidence that long-term exposure to different parts of the light spectrum deserves greater attention. It is already clear that when designing lighting, we should consider not only its intensity but also the quality and balance of its light spectrum.
Translated using AI
