The Story of Blue Light
Although blue light is environmentally friendly and naturally provided by the sun, blue light can affect your sleep and potentially cause health issues. Until the arrival of artificial lighting, the sun was the major source of lighting, with people spending their evenings in relative darkness. Now, in much of the world, evenings are illumined due to technology which is readily available at the touch of our fingers.
Little do we know, but we may be paying a price for using all that light. At night, light throws the body’s biological clock (the circadian rhythm) out of sync. Due to this, our sleep can suffer causing fatigue and headaches. Worst of all, research shows that it may contribute to the causation of cancer, diabetes, heart disease, and obesity.
Blue wavelengths that are beneficial during daylight hours because they boost attention, reaction times, and mood also seem to be the most disruptive at night. With the continuing creation of electronics with screens, as well as energy-efficient lighting, our exposure to blue wavelengths, especially after sundown is increasing sharply.
Some studies that suggest a link between exposure to light at night to some types of cancer, heart disease, diabetes, and obesity. This is not proof that night time light exposure causes these conditions; nor is it clear why it could be bad for us however we do know that exposure to light suppresses the secretion of melatonin, a hormone that influences circadian rhythms, and there’s some preliminary experimental evidence that lower melatonin levels might explain the association with cancer.
Protect yourself from blue light at night
· If you use electronic devices at night, consider using anti-blue light screen protectors on your devices and wearing blue light blocking glasses.
· Use dim red lights for night lights as red light has the least amount of power to shift circadian rhythm and suppress melatonin.
· Try and avoid using devices one hour before you go to sleep at night.
· Expose yourself to lots of bright light during the day as this will boost your ability to sleep at night, as well as your mood and alertness during daylight.