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The Role of Light in Our Existence
Light is the energy that powers all biological organisms. All biochemical reactions are powered by light energy, whether directly from the sun or for example, in the form of food. Our biology chose blue light as the wavelengths with which to control a circadian rhythm. If we have blue light at the right time of day, it's really good for us. And then if we have it at the wrong time of day,. It can be an issue for us.