It works like magic. Most SAD researchers are convinced that inadequate light creates a disturbance in brain chemistry. When light rays strike the retina of the eye, they're converted into nerve impulses and move toward the brain. But among SAD sufferers, something goes awry. But this is changing.
Patients thus can recover the cost of a light box within six months, and with fewer side effects.
Thanks to the invention of the light bulb, we have been able to steal many more waking hours from the darkness. That's made a lot of progress possible, but it also puts modern life at odds with the rhythms of mother nature. Yet Eskimos in rural villages have no complaints. They adapt to nature's rhythms, by sleeping more and doing less. With Technology I've seen advertisements for boxes, that are supposed to be therapeutic for certain types of depression.