"The groundwork of all happiness is health." - Leigh Hunt

Blue light has a dark side.

What is blue light? Blue light affects your sleep and more.

Although it's environmentally friendly, blue light can affect your sleep and potentially cause illness. Until the appearance of artificial light, the sun was the fundamental source of sunshine, and other people spent their evenings in (relative) darkness. Now, in most parts of the world, the evenings are brighter, and we take our quick access to all those lumens as a right.

But we could also be paying for sitting in all that light. At night, light throws the body's biological clock — the circadian rhythm — out of whack. Sleep comes. Worse, research shows that it May be Contribute to cancer, diabetes, heart disease, and obesity.

What is blue light?

Not all colours of sunshine have the identical effect. Blue wavelengths — that are helpful during daylight because they boost attention, response times and mood — are most disruptive at night. And the proliferation of electronics with screens, in addition to energy-efficient lighting, is increasing our exposure to blue wavelengths, especially after sunset.

Light and sleep

Is nighttime light exposure poor?

Some studies suggest a link between exposure to light at night, resembling working night shifts, and diabetes, heart disease and obesity. This is just not proof that exposure to light at night causes these conditions. Nor is it clear why it could be bad for us.

Blue light and sleep effects

In one other blue light study, researchers on the University of Toronto compared the melatonin levels of individuals exposed to indoor light who wore blue-light-blocking glasses to those that didn't wear the glasses to regular dim light. were facing The proven fact that hormone levels were nearly an identical in each groups supports the hypothesis that blue light is a potent suppressor of melatonin. It also suggests that shift staff and night owls might give you the chance to guard themselves in the event that they wear glasses that block blue light. Cheap sunglasses with orange lenses block blue light, but additionally they block other colours, in order that they usually are not suitable for indoor use at night. Glasses that block blue light alone can cost as much as $80.

LED blue light exposure

If blue light has antagonistic health effects, then environmental concerns, and the pursuit of energy-efficient lighting, may conflict with personal health. Those curlicue compact fluorescent light bulbs and LED lights are way more energy efficient than the quaint incandescent light bulbs we grew up with. But additionally they produce more blue light.

The physics of fluorescent lights can't be modified, however the within the bulb will be coated in order that they produce a hotter, less blue light. LED lights are more efficient than fluorescent lights, but additionally they produce plenty of sunshine within the blue spectrum. Richard Hensler, a lighting researcher at John Carroll University in Cleveland, notes that odd incandescent lights also produce some blue light, though lower than most fluorescent light bulbs.

Protect yourself from blue light at night.

  • Use dim red lights for night lighting. Red light is less more likely to alter circadian rhythms and suppress melatonin.
  • Avoid taking a look at shiny screens two to 3 hours before bed.
  • If you're employed night shifts or use numerous electronic devices at night, consider wearing blue-tinted glasses or installing an app that filters out blue/green wavelengths at night.
  • Expose yourself to a number of shiny light throughout the day, which can improve your ability to sleep at night, in addition to your mood and application throughout the day.

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