Keinotekoinen valo voi häiritä vuorokausirytmiä ja unta

This text explains how artificial light exposure at the wrong times of day can disrupt the body's circadian rhythm. It highlights the role of natural sunrise and sunset as signals for sleep-wake regulation and warns that screens and bright indoor lighting may impair falling asleep and sleep quality. It also encourages avoiding artificial light before bed and right after waking, while maintaining a regular sleep schedule.