Andrew Huberman· PhD
perhaps the best way to wrap this discussion about the physics and the biology of light with a bit of a bow is to think about light as a transducer, meaning a communicator of what's going on in the environment around you and that some of those signals are arriving at the surface and impacting the surface of your body. But many of those signals are being taken by cells at the surface of your body, meaning your melanocytes in your skin and the photoreceptors of your eyes, and then being passed off as a set of instructions to the other organs and tissues of your body.