LED lighting may have an impact on the physical and mental health of people

Has gradually penetrated into people's daily life, its development prospect was unanimously optimistic about the industry. People look forward to in the industry show explosive growth at the same time, more and more people began to pay attention to the effect of light quality problems of LED lighting industry development. The impact of LED lighting on people how, what are the influencing factors of the promotion of LED lighting, what are the main problems in the development of global standards? ISA (International Union) board of directors, Honorary Professor of University of Sydney, Australia, former vice president of the international lighting Committee WarrenJulian published his unique insights. He focused on lighting research and lighting design and its impact on people, because of its great contribution to the lighting research, has just been awarded the medal of honor awarded by the Australian government.

LED lighting may have an impact on human physiology and mental health

The field of general lighting is the largest market in the future of LED, the current LED technology, people pay more and more attention to the impact of LED lighting on people. WarrenJulian said that the impact of LED lighting on people mainly in two areas. First, high brightness may be harmful to the eyes, especially Blu ray LED and the use of blue LED and yellow phosphor white LED. This is because the light node is very small, in order to obtain high efficiency, people will make LED very bright. Children are more likely to hurt their eyes if they stare at the light source. The French workplace health department has raised concerns about the issue, but I'm not sure about the official results.

Second, the use of LED to do wall wash lights or handrails lighting, light will be directly or indirectly reflected into the eye, causing people to see each LED point light source. The pattern of the light spot can cause nausea, and may even cause some people to cramp, which is caused by the distance between the points of light. I found that in Shanghai, World Expo, there is such a problem, the Huangpu River, some of the buildings decorated with LED also have.

The physiological effects of LED light on the human eye (eye), as well as the physical and psychological effects on some people (spasms or extreme discomfort) are mentioned above. These issues will be resolved, but designers need to be more aware of the unique problems and advantages of LED and gain more experience.

The above is the negative effect of LED, its positive effects and other similar light.

It may take years for LED to replace tubular fluorescent lamps

At present, LED lamps are still more expensive than traditional light sources, and some interior lighting customers (such as owners) are worried that the new LED products (unproven) will result in maintenance problems. In decorative lighting, usually a few years will be replaced, so its life and cost is not very important. In outdoor lighting, people are also concerned about LED or drive caused by maintenance problems, because of the high labor costs of maintenance.

WarrenJulian believes that the replacement lamp is not a long-term solution, there will be a new type of lamps. The new lamp will give full play to the advantages of LED, is currently being developed in the main lamp and wall lamp. LED replace tubular fluorescent lamps may take years, there are two reasons: first, LED light diffusion is poor, and the two is because the LED is very small, high brightness will lead to glare, you need to reduce the brightness of the lamp to avoid the point of light. If these two problems are well resolved, then LED will be able to replace the office and other places of tubular fluorescent lamps. The LED into the large space, such as the factory will be later, because the replacement of high power lighting, such as 400W metal halide lamp needs a lot of LED can be achieved, the current heat technology has yet to be developed.

According to the general market forecast, LED lighting will achieve rapid growth in the next 2-3 years, WarrenJulian for outdoor lighting, backlighting, his answer is yes, but the lighting of work places (such as offices, factories and so on) the period of rapid growth will come later.

Some of the alternative lights hinder the penetration of LED in the field of indoor lighting. Tubular fluorescent lamps are very efficient, LED replacement lamps currently seem unnecessary. MR16 was originally used as a projector light, and not suitable for lighting. MR16 for lighting is derived from a designer's favorite, think it is small, so use it for lighting design, other designers will follow. As the use of lighting source, followed by the emergence of heat, voltage drop and lamp support and other issues. People need new lamps to replace MR16 as the light source, and the sooner the better. The needs of the market low price high quality LED indoor lighting (not merely lamp).

Another obstacle is part of the problem. Lighting is "abandoned", because e-waste is a big problem, manufacturers may need to be responsible for waste disposal, which will increase the cost of products. There are many similar cost issues to be solved, such as resources. I hope that these issues will be resolved in the next few years, when the LED lamp will replace tubular fluorescent lamps.

The consistency of test methods is helpful to understand the significance of test results

WarrenJulian said that many organizations have made positive efforts in the formulation of standards, the most important of which there are two organizations, one is the International Electrotechnical Commission (IEC), the other is the international organization for Standardization (ISO). IEC studies electrical problems such as drivers, ISO, for the direction of application, is the photometric and colorimetric measurements, but the measurement method is developed by the International Commission on illumination (CIE). Thus, CIE workers