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LED luminescence, what is green lighting

From: Data:16/08/2016

A, green lighting project: is refers to jointly implemented by the State Economic and Trade Commission and the United Nations Environment Protection Plan Department to promote the development of lighting industry, construct a green lighting environment promotion plan in the whole society.

two, green lighting: refers to the use of efficient green light source, the scientific design and construction of energy-efficient, bright and comfortable lighting environment. Three, green lighting technology index: 1, light flux emitted bright enough, environment. 2, is the sun color, look no color cast of any color (color), good color performance. 3, is the flux stability, instability, no stroboscopic effect harm, no light pollution, give people the feeling of comfort. The decisive factor to realize the technical index of green lighting is the performance of the green light source. 4, green light source, the main technical performance: high quality green light source, has the following main technical performance: (1) is a high efficiency, high brightness, high energy saving. Light: light source per W electric power generating light energy emitted from the (commonly known as luminous flux). Unit: LM /Watt (Lm/w). The more light flux per W electric power generation, light efficiency is high, the higher the brightness, more energy saving. (2) the sun is light color, high color performance. The optical spectrum, generating electric light source: the color of the light is the sun light. This watch in the surface color, can not produce color, no color, display objects on the surface of the original color. In order to show the advantages and disadvantages of the color rendering performance, the concept of the R value of the color rendering index is introduced. In light of the sun R=100 as the standard, the green light source R value should be: R≥ 85. The greater the R value of the color rendering index of the light source, the better the color rendering property of the light source. (3) is not stable, luminous flux fluctuation, no stroboscopic effect harm. The flux generated electric light source is not stable, produce light wave, called strobe. The harm of stroboscopic stroboscopic effect called. Stroboscopic effect is essentially light pollution and its harm. (4) the T8 straight tube fluorescent lamp widely used (inductive), incandescent lamp, high-pressure mercury lamp, sodium lamp, electric light source. The light flux fluctuations in the depth of 55-65%, frequency of 100 per week, great harm stroboscopic effect. Technical measures to eliminate the stroboscopic effect, is to improve the driving electric light source luminous electric power frequency. Green light source driving the electric light sources, the luminous body electric power frequency 40 kHz (Qian Zhou) above (CE certification requirements in more than 40 kHz), in order to avoid the stroboscopic effect. (5) it is required that, due to the current production of some manufacturers, the ability of science and technology development is weak. Electronic straight tube fluorescent lamps and most of the energy-saving lamps, driving power frequency is only 20KHz or so, very low to about 15KHz. The flux fluctuation still exist in depth 25-35%, stroboscopic effect is still great harm. The physical definition of the five, lighting technology, part of the physical quantity: 1, flux: electric light source of light energy emitted, known as luminous flux unit for the lumens (LM). In a fixed space, more luminous flux generated electric light source, people on the surrounding environment visual feeling more bright. 2, light effect: each w electric power generating electric light source luminous flux emitted is called light effect, unit LM /Watt (Lm/w). Electric light source per w electric power generating more luminous flux emitted by the electric light source that converts electrical energy into light energy efficiency is high. 3, the effective pupil lumens (commonly known as an effective optical visual effect): refers to is in the electric light source emitted luminous flux, and is the human eye visual feel a part of the visible light. Effective pupil lumens for pure digital physical quantity, it is indicated that the effective luminous flux. Light effective pupil lumens multiples higher, the higher the actual brightness of the light source. Therefore, in the industrial and commercial lighting, should choose light effective pupil lumens high multiples. The commonly used electric light source effectively pupil lumens multiple relationship. 4, color refers to the color of light emitted by the light source generating electricity. For intuitive quantification, the concept of K's temperature is usually introduced to describe. The color is divided into: low temperature, moderate temperature and high temperature. (1), low color temperature: K's temperature in 2700K-3500K. As at 8 in the morning before the sunrise, the light emitted by the lamp, candle etc. for low color temperature. Contain long wave red, orange light more. The color is softer, gives the visual sense of warm warm. (2), moderate temperature: K's temperature in 3500K-4500K. Such as after 8 am, 10 hours before the sun light. Contains less orange light and more blue, the color performance of soft and bright, give people a sense of visual clear and comfortable. (3), high color temperature: K's temperature in 4500K-6500K. As the morning after 10 a.m., 2 p.m. sun light, high frequency high efficiency energy-saving lamps emit light for high temperature. With the more green basket, shortwave, color performance of natural sunlight, gives the visual sense of bright and comfortable. The electric light source color temperature level, does not indicate that the performance of electric light source. The electric light source color temperature level selection is mainly based on applications and lighting requirements and targets. For industrial and commercial lighting environment requirements, bright and comfortable, good color performance, should choose the high temperature electric light source. 5, color rendering performance: the light emitted by the electric light source, the ability to display the original color of the object surface. The higher the color rendering property of the light source, the more realistic the color of the object surface. In order to describe the color rendering property, the concept of the R value of the color rendering index is introduced. The R value of the electric light source is more close to 100, the R=100 value of the electric light source is close to, which indicates that the color property of the electric light source is better. In the industrial, commercial lighting should be selected R value of the large light source. 6, the light source life: refers to the electric light source from light to extinguish the time for the light source life, the unit for hours (H). 7, electric light stroboscopic, stroboscopic effect: see "on the dangers of electric light stroboscopic effect and Countermeasures to improve the technology," a text. 8, brightness and illumination: brightness and illumination, are two related and different physical quantity. Brightness: refers to the person looking at the light source, the eye to feel the light. The brightness of luminous flux depends on the temperature of the light source and the level of the luminous flux of the light source, how much is the decisive factor. Luminous flux of the light source, the brightness is high. Illumination: refers to the light source to the surrounding space or on the ground, the unit area of the luminous flux by irradiation. Light into the surrounding space and on the ground of the flux, high illumination. The correlation and difference between the brightness and the illumination intensity, the brightness and the illumination intensity are two related and different physical quantities. The associated physical quantity is affected by source brightness and illumination level is common, namely: flux. Different point is that affect the brightness of the light source of luminous flux, that is how much surface light source radiation flux; luminous flux of light illumination, the finger is source of radiation to the illuminated area (such as flux on the walls, the ground, the working table) how much. The two different locations, the number of different relations, the external factors are also different. In the actual production, life lighting design and measurement, the main assessment of the physical quantity of light. Special note: the brightness of the light source, sometimes by color temperature influence. In the same light flux, high light color temperature will produce high brightness visual sense. This “ high brightness “ light source, illumination is not higher than other light sources, light efficiency is not higher than other light sources, but a dazzling “ false bright “.