New Consumer Demand for Comfort and Health, LED Lighting Industry Usher In the Era of Healthy Lighting
Natural light full-spectrum LED is coming into a new development trend of lighting
Comfortable and healthy lighting has become a new demand for consumption. So what kind of light source is a comfortable and healthy light source? Human beings have lived on the earth for millions of years and are constantly evolving with changes in the living environment, but the only constant is dependence and adaptation on sunlight. Therefore, it can be considered that natural light or sunlight is the most comfortable and healthy light source for human beings. Therefore, when manufacturers introduce health lighting products, they almost always use sunlight as a benchmark, similar to sunlight or even better than sunlight.
The spectrum of sunlight includes spectral curves of ultraviolet, visible and infrared light, which can be called a full spectrum. The natural light full-spectrum LED light source refers to the ratio of each wavelength band in the visible part of the LED light source to the sunlight, and the color rendering index is close to 100. The traditional LED light source emits light mainly by a blue light chip with a wavelength of about 450nm. The blue light chip excites the phosphor to form white light, which will cause the blue light to be over-radiated and lack some blue-green and deep red light, especially some inferior light source products, which easily lead to vision eye diseases of different degrees such as decreased cataracts and blindness. Therefore, high-quality natural light-like full-spectrum LED light sources have become a new trend in the development of healthy and comfortable lighting.
Natural light spectrum
Purple light chip + phosphor technology route is more suitable for health lighting
At present, there are two main solutions for LED full-spectrum light sources. One is to excite phosphors from 450-460nm blue light chips. By improving the phosphor to improve the color rendering index and light efficiency, Ra can reach more than 97, but it still shows a high intensity of the blue peak is just that the phosphor covers a wider band than ordinary LEDs to improve Ra and R9. The continuity of the spectrum is not perfect, and there is a large difference between the intensity ratio of each band and solar energy. Therefore, the advantages of this solution for health lighting are not obvious. It is mainly used in commercial lighting, and its high color rendering index is its main advantage.
Another solution is to excite RGB multi-color phosphors with a violet chip to achieve a continuous spectrum, without the lack of blue-green and deep-red light coverage like bi-color phosphors. The light source of this scheme is closest to the solar spectrum, which not only achieves high reduction and saturation, but also avoids the appearance of short-wave blue light. Although light efficiency will be sacrificed, there is still some room for improvement.
Healthy lighting is the trend, and full-spectrum is a method
With the continuous improvement of people’s living environments, health issues will become more and more important. Light is one of the main driving forces of the human circadian system. Whether it is natural sunlight or an artificial light source, it will trigger a series of circadian physiological reactions. Health lighting, popularly speaking, is that through lighting, it can improve people’s working, studying, and living conditions and quality, and promote mental and health, which is also what Logos Lighting doing at present. If you have any questions, welcome to contact us directly.