Having trouble sleeping? According to university studies, your lighting may be the culprit. Studies show exposure to blue light, the wavelength closest to ultraviolet on the light spectrum, can affect your sleep cycle.
Remember: as recently as 200 years ago, people lived by the light of the sun and slept by the light of the moon. The body’s biological clock—or circadian rhythm—followed this pattern naturally. Evening illumination came by candle, torch, hearth and other fire-based lighting. Then, electric lighting began to fill homes, and suddenly people stayed up long past the setting sun.
Like Day and Night
These days, we’re exposed to high amounts of blue light from our phones, computers, and tablets—even energy-efficient lighting. In fact, the latest energy-efficient lighting—compact fluorescent and LED lights—produce more blue light than old-fashioned incandescent lightbulbs.
A limited amount of blue light is considered helpful during the day because it helps improve attention and mood. Exposure to blue light at night, however, can interrupt your sleep pattern.