The brightness of the LED lamps and lanterns is not equal to intensity of illumination

As the LED lighting technology and the wide application of LED lighting products, whether it's airport, hotel, or office space. 。 。 。 。 。 Wherever we can experience the LED lamps and lanterns in building lighting effect. From an intuitive level, everyone seemed to have this kind of intuition, is trying to how light a lamp for lamps and lanterns of a judge index. However, this turned out to be wrong. Look at the following common office lighting environment, which looks brighter? It is obvious that the first two office light feeling is very bright, but the space is not bright, uncomfortable; The last light itself is not on office, but it is quite bright space, comfortable. This reminds us of one of the most fundamental reason: the basic function of lamps and lanterns is used to give light to others, rather than to highlight yourself. As a result, the brightness of the surface of lamps and lanterns is not important. And people a bright lights or daily evaluation, are often the eyes see the lamps and lanterns of the surface brightness of lamps and lanterns, mistook the brighter the lamps and lanterns of surface, the lamp is better. Actual use, can appear the lamps and lanterns look very bright, but space is not enough light. And what we want, just is the bright space. Technically, the lighting design is the design of the spatial intensity distribution, according to the function of space and the activities of people, to determine where should be bright, where should not be bright, where there should be more bright. The brightness distribution relations, also included as space element itself of lamps and lanterns. Mainly involves the brightness of the above areas. And in the actual process of lighting design, we not only brightness to measure a bright degree of the space, intensity of illumination is also another important indicators. And both always be confused by people. The relationship between the two, in short, it is the number of the light bulb, Luminous flux) In a certain direction with a certain intensity ( Light intensity) Incident to a surface, this time can be measured the intensity of illumination of the surface. Whether the surface is black or white, is wood or stone, illuminance values are the same. The surface can reflect light, may be a mirror, the more likely is a diffuse reflection, to many directions in space are a reflection of light. When we stand in a position to observe the physical contact, we can see the bright degree of the surface ( Brightness) 。 Due to the strong relationship between brightness and intensity of illumination, relevant national standards and norms and orientation to the relationship between the illuminance and luminance, simplified as a conversion ratio is related to reflection coefficient relations, even some people of brightness concept fuzzy, think illumination uniformity is brightness uniformity, the brightness even mistaken for illumination. Now, we can so to differentiate between the two and induction, intensity of illumination, is an objective parameter, is something we use instrument to determine the actual amount of light to a surface. Launch brightness, it is to point to an object or the extent of the reflected light is perceived by the human eye. Brightness and intensity of illumination, on the other hand, have no what does light or heavy, they constitute the whole of photosynthetic efficiency of LED lamps and lanterns. A good, comfortable lighting space, must by the high photosynthetic efficiency of lamps and lanterns to build.
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