This is the clock that uses light and sound therapy to help reset the body’s regular sleep patterns for falling asleep easier at night and waking with a more rejuvenated feeling in the morning. Known as the body’s internal clock, the circadian rhythm responds to light levels over the course of a 24-hour cycle, causing one to sleep or wake up. The clock’s light panel uses 70 white and 30 blue LEDs that decrease or increase in intensity to simulate dusk or dawn–a Harvard Medical School study revealed that blue light can immediately improve alertness in the morning.