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2018-10-31 ProLight introduces long wavelength Blue LED series for Human Centric Lighting

In recent times, the topic of blue light harming the eyes have been taken very seriously and new LED development have focused in reducing the effect of blue light on the body. Theoretically, blue light wavelength ranges from 420nm to 480nm, but according to one of the reports done by International Electrotechnical Commission, (IEC) that the shorter wavelength range of blue light from 415nm to 460nm is where it is most likely to damage the eye. The report also mentioned that when people exposed to these short blue light ranges will increase the risk of getting eye disease such as Macular degeneration.


Most of the LED lighting and display backlight module uses blue light chip as its core emitting source, hence, more and more anti-blue light products are emerging into the market. Current anti-blue light products primarily use a layer of anti-blue coating as a filtering effect or simply reduce the brightness of blue light. However, these types of solution will affect the color appearance to become more yellowish and distorted, and therefore make people not able to distinguish the real color.


Blue light as an important part of white light spectrum can be split into two halves at 455nm. The shorter wavelength of blue light from 420nm~455nm generate much greater energy and therefore causes the eye to get tired more easily. Furthermore, most white LED light products on the market with high color rendering index (CRI) contain the blue light (shorter wavelength 415nm to 460nm) strength that is 30~50% higher than other color. On the other hand, blue light with longer wavelength which is greater than 455nm, has lower energy and less damage to the eyes. In addition, some researchers have found that longer wavelength blue light from 450~480nm can maintain people’s concentration. Under this basis, ProLight will develop two types of products with new spectrum. One type is called the Energetic Mode (can refer to orange line of picture 1), it contains a spectrum recipe with mainly blue light greater than 460nm. You can also clearly see the spectrum has lower short wavelength blue light and strengthen the use of longer wavelength blue light. When compare the Energetic Mode spectrum to the current CRI 95 white LED spectrum (can refer to green line of picture 1), it is evident that harmful blue light range is reduced and having more long wavelength blue light range, which can increase concentration and be used in places such as classrooms and offices.


Further on we will introduce second type called the Comfort Mode where the spectrum is created using exclusive phosphor recipe. The spectrum will be a combination of various colors and greatly reduce the use of blue light to generate a bright but comfortable effect. This can be used in bedroom or other places where people need rest and relaxed like the employee’s resting area and VIP room. Also, it can be designed into light fixture which contain both modes, which becomes a dimmable smart lighting.



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