It is becoming increasingly apparent that humans are as intimately dependent upon light as plants are. It is an absolute certainty that the character of light emitted by the sun eight minutes ago is already beginning to express itself in our physiology.
Most information has to do with light.
Therefore, plants are light-based systems and humans metabolic redox systems. But it is an iatrogenically false assumption that humans derive nothing from exposure to light other than scorched buns. Oh sure, doctors say, the sun and all that diurnal stuff may have some vague but not particularly important relationship with human kind, but basically such drivel can be ignored. However, it is becoming increasingly apparent that humans are as intimately dependent upon light as plants are. Plants are loaded with pigmented light sensitive photoreceptor molecules, generically called phytochromes of which chlorophyll is an example.