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What is blue light irradiation?
Blue light (wavelength range from 400 nm to 480 nm) is UV-free irradiation that shows fewer harmful side effects to mammalian cells than ultraviolet irradiation [3].
What is the wavelength of blue LED?
Narrow-spectrum blue light (also called blue LED light or short-wavelength LED light) is a type of high-energy visible light, defined as having a wavelength between 400 and 450 nm.
What is the blue light in LED lights?
But here’s where Thomas Edison may be rolling over in his grave: LEDs produce short-wave, high-energy blue light, which has been linked to biological and sleep disturbances. It is also associated with blue light hazard — when an intense light source causes damage to the retina.
What does blue light do to your cells?
How is blue light bad for health? Continued exposure to blue light over time could damage retinal cells and cause vision problems such as age-related macular degeneration. It can also contribute to cataracts, eye cancer and growths on the clear covering over the white part of the eye.
What range of blue light is harmful?
Harmful Blue Light, located at the 415–455nm range on the visible light spectrum, is virtually everywhere – indoors and out: computer screens, tablets, smart phones, gaming devices, LED TVs & LED lights, fluorescent lights, and of course from the sun.
Why it was difficult to make a blue LED?
The key ingredient for blue LEDs is gallium nitride, a robust material with a large energy separation or “gap” between electrons and holes. This gap is crucial in tuning the energy of the emitted photons to produce blue light.
Why are blue LEDs so bright?
They actually are brighter. Combine that with the fact that in the dark the rods in our eyes are more sensitive to blue light and that since there are more rods towards the edge of the retina, our peripheral vision picks up the blue more readily making it seem more noticeable even when you aren’t looking at it.
Are blue LED lights harmful?
Almost all blue light passes straight through to the back of your retina. Some research has shown blue light may increase the risk of macular degeneration, a disease of the retina. Research shows blue light exposure may lead to age-related macular degeneration, or AMD.
Does blue LED light whiten teeth?
LED (light-emitting diode) produces blue light to increase the teeth whitening process without any radiating heat to the teeth. Most over-the-counter tooth whitening kits with lights contain LED products – although dentists might use LED blue light, as well.
What kind of light emits blue light?
Abstract Light-emitting diodes (LEDs) have been used to provide illumination in industrial and commercial environments. LEDs are also used in TVs, computers, smart phones, and tablets. Although the light emitted by most LEDs appears white, LEDs have peak emission in the blue light range (400–490 nm).
How does blue light affect the circadian system?
Although the light emitted by most LEDs appears white, LEDs have peak emission in the blue light range (400–490 nm). The accumulating experimental evidence has indicated that exposure to blue light can affect many physiologic functions, and it can be used to treat circadian and sleep dysfunctions.
What are the effects of exposure to blue light?
Although most studies on the effects of blue light have focused on the mechanisms responsible for the damage to the photoreceptors following an acute exposure to high intensity light, some studies have reported that sub-threshold exposure to blue light can also induce damage in photoreceptors [105-107].
Is the incandescent bulb a revolution in lighting?
Lighting sources and technology have experienced a revolution in the last 15–20 years. Lighting sources and technology, especially in non-commercial or industrial illumination applications, have traditionally been slow to change [1]. In most homes, the incandescent bulb and Edison socket have been omnipresent.