We need the sun to be healthy. And red and near-infrared light are a big part of the reason why. Just as our body requires the intake of certain vitamins and minerals (e.g. vitamin C, magnesium, zinc, etc.) from the diet to function normally, our cells also require certain “light nutrients” (adequate amounts of certain wavelengths of light) to be healthy. In short, the human body needs red and near-infrared light to function optimally. Just as we can have malnutrition from a poor diet, we can have mal-illumination from poor light exposure.
