Like a sunrise, the Soleil Sunrise Alarm Clock light/dawn simulator wakes you naturally and peacefully for the day ahead. The light alarm gradually increases the intensity of its special built-in light, simulating a natural sunrise. Your body wakes instinctively, as if waking with the light of the sun. This natural method of waking up leaves you feeling refreshed, energized, and in a better mood. Clinical studies at the National Institute of Health indicate that waking to light has been known to help people with Seasonal Affective Disorder (SAD), various forms of depression, and sleep disorders to overcome their problems by increasing daytime energy, limiting winter weight gain, and allowing them to wake up easier.