Light-therapy lamps that simulate a gentle dawn are readily available and cost less than one hundred dollars. Increasing light intensity and optimizing the wavelength of light can compensate for some of the organic deterioration of the SCN and related chemical circuits that accompany aging. But the light therapy must be done at the correct time of day—upon waking—and it must be done consistently. Everyone is different, but by experimenting with different intensities and durations of light exposure, you can arrive at the most effective treatment. You may have heard of seasonal affective
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