The ability to sleep is strongly controlled by the internal or circadian clock. The 2017 Noble Prize in Medicine was awarded to three scientists for their study of the circadian clock. Every living thing has a way of telling time. We now know that the clock is reset every morning when the eyes are exposed to light, especially blue light. Twelve hours later the circadian clock will signal the pineal gland to start making melatonin, the hormone that helps us sleep, but only if the eyes are not exposed to the blue rays in ordinary white light. LowBlueLights products make it possible to avoid blue light for several hours before bedtime. This allows melatonin to begin flowing. Thanks to the Noble Laureates we now know how this all works to improve our sleep and health.