What effect does blue light have on sleep patterns?

Blue light plays a significant role in regulating sleep patterns due to its impact on the body's circadian rhythms. Exposure to blue light, particularly during the evening and night, can interfere with the production of melatonin, the hormone responsible for signaling to the body that it is time to sleep. High levels of blue light exposure from screens and artificial lighting can lead to difficulty falling asleep, decreased sleep duration, and overall poorer sleep quality, which is why it is often associated with insomnia.

Understanding how blue light affects the biological processes related to sleep helps clarify why this option is the correct answer. While other aspects such as improving clarity or promoting relaxation can be associated with specific uses of blue light, those effects do not directly relate to its influence on sleep patterns. Instead, the predominant effect is a negative one, causing sleep disturbances and contributing to conditions like insomnia.