How can blue light be effectively used in sleep therapy to improve sleep quality?

Blue light can be effectively used in sleep therapy to improve sleep quality by helping to regulate the body's internal clock, or circadian rhythm. Exposure to blue light in the morning can help signal to the body that it is time to wake up, while avoiding blue light in the evening can help promote the production of melatonin, a hormone that regulates sleep. This can help improve sleep quality by aligning the body's natural sleep-wake cycle with the external environment.