LED lighting in the cities problems in the application of night


Preface

The emergence of LED light source for lighting the field opened up a whole new area of technology, and with high efficiency, low power consumption, long life, small size, fast response characteristics have been widely used, especially in the display, indicator light , traffic lights, etc. demonstrated its strong advantages. With the LED raising the level of applied technology, LED has been widely used in urban landscape in the performance of the urban night added a new vitality, and thus has become widely accepted. But we should note: Due to a number of cities the building of the town before the night is not an overall planning and positioning, in the night construction, energy-saving products to be promoted as an LED, particularly in the architectural landscape lighting on the large-scale adoption of LED lighting, so that some cities night and chaotically disorder, lack of taste, can not reflect the characteristics of urban landscape, affecting the city's image, should cause all levels of government and urban management department's attention.

LED night in the city is currently a problem in the application

1. The lack of planning and design, construction, LED night by blind application of

Night before carrying out the construction in some cities, there is no necessary overall planning of urban night, even if some monomer is often the landscape lighting design or engineering from the lamp manufacturer to provide lighting solutions for the building after the tender, especially in recent years, LED night in the city Application of the proportion of heavier and heavier, the speed faster and faster, it seems "suddenly, such as spring night, the Trees 10000 Pear Tree open" trend. At the same time, the use of LED, the light and color without control, increased use of fancy colored light, change more frequently flashing, so that night visual effects to be very chaotic. Some of the city's landmark buildings, administrative office buildings, residential construction, also due to improper use of LED, make these architectural landscape lighting lose their style, and even affected the life of the residents at night, interfering with traffic.

2. LED product is too single, too simple technique of expression

Because LED products still in development stage, currently on the market for LED lighting for night work are common varieties of LED outline light, flat wire belt lights, point light, linear wall wash lights. Although some manufacturers have developed high-power LED Floodlight, wash wall lamp and so on, but difficult to use because of its high cost. Especially in the architectural landscape lighting, the large number of used LED outline Crochet, horizontal vertical manoeuvering, the dotted line with other simple design method, resulting in the city's night spots line overlapping, pattern-based, similarity-based, composition chaos, leading to night effects of a lack of artistry.

a) color light, improper use of dynamic light

As the LED light color is more rich, dynamic light performance in a more flexible, and some cities in the night when the building, too much emphasis on visual stimulation, pairs of colored light, the use of dynamic light without restriction and control, and even the pursuit of beautiful bells and whistles, color light Quick jump strobe lighting methods, such as: excessive use of colorful flowing water, full-color jump change, gradual change, so that the city's light and colors lose their tone, reducing the night of cultural taste, affecting the public's appreciation of the psychological and aesthetic orientation.

b) LED lighting products market is flooded with inferior, to the Urban Landscape Construction waste

At present, the countries have not yet introduced on the LED quality testing standards for LED products on the market is difficult to distinguish good and bad, the owner of the LED is difficult to judge the merits of product quality, coupled with investment and bidding conditions, restrictions and some projects for the interests of business-driven and other reasons, making a high-quality LED products difficult to really get to use, and some poor, low price LED products are now flooding the city night market, the quality of the urban night project was seriously affected, some night works put into use Soon appeared the phenomenon of the high failure rate, and some projects while lighting the lamp while repair phenomena have occurred, an increase of night maintenance repair costs and even result in duplication of investment and duplicated construction phenomenon.

Application of LED in the city night is worth exploring a few questions

Urban Landscape reflects an urban political, economic, scientific and technological development level of a form of expression is also a city of history and culture, civilization and progress of the comprehensive embodiment. The creation of a city with distinct characteristics and night, displaying the city's charm and meaning to the public to experience the city lighting technology and lighting the city night scene blending art visual effects, night the building of the city lies the true meaning. The author on the current LED applications in the city night is worth noting a few questions, the following study:

1. LED used in the construction should be combined with urban landscape urban landscape plan

LED because of its small size, low power consumption, long life, application flexibility, visibility and strong advantages, is undoubtedly worthy of promotion and application of the product, but large-scale and large-scale and large-scale use of LED lighting means to conduct urban Night adequacy of the building is worthy of careful consideration.

Urban Landscape is an important resource for the city, is a science, is a kind of visual arts. Both urban and small, the streets, and so the composition of the new building house the city's night view of the multi-carrier. China's urban night building from the early to allow the Town to light up, and now allow the night light with more charm, from the emotional to the rational construction of the building of a gradual transition period, so whether it is traditional floodlights, or the present "LED" Night Heat, all must be carried out under the overall city planning, according to urban planning, history, culture and development prospects of the city's night lighting reasonable position, the use of light visual arts, combined with a variety of performance practices, and thus the performance of characteristics of the city to show the city's cultural connotations. With the extensive application of LED in the urban landscape planning and design, the design for the LED feature is particularly important. Night in the city, we should advocate a reasonable, appropriate, proper use of LED lighting, LED lighting and illumination technology and investment, within the transparent lighting, contour lighting and other lighting methods and organically integrated design applications, a number of important buildings did not LED lighting suitable for a simple way, should be strictly controlled. And in some cities landmarks, building legislation large area lighting, the adoption of LED should carry out environmental and visual analysis, scientific design, high standards of construction, to avoid night blindness affecting the city's image and artistic taste. Only in a city night scene under the premise of the overall planning, science and application of LED lighting, combined with various lighting methods, in order to demonstrate the art of urban landscape image of integrity, harmony, the city's night was to life.

2. Note that LED light application of color and dynamic light

LED with high brightness, strong direction and light color diversity, and the program control is more flexible application easy to good effect. For this reason, in practical applications should pay attention to the LED light color and dynamic light control.
In the night, the visual light and color to attract the most sensitive to excessive light color interwoven and lead people to the visual confusion, affect people's aesthetic judgments. Therefore, the use of LED design stresses with various types of light color should be full respect for the city's color tone, should be based on different architectural nature and the environment in which the different color choices for light in color to create the overall environment should be and the City tone color coordinated. Special attention is that for the general architectural lighting in terms of the optical color selection is not possible, single architectural lighting light color as far as possible the types of applications within the three kinds of control, and the color should not be too pure, taking into account the Light color and color coordination of the construction itself. For commercial architectural lighting, entertainment lighting, LED in the application can be a bold attempt to multi-colored light applications, but also allows the effect of the composition of color patterns.

LED light in the night of the most dynamic can stimulate the human visual system, too fast, too frequent blinking light on the dynamics of human visual, psychological and physiological will have a direct impact, in practical applications deal with dynamic light control. Urban landmark buildings, administrative office buildings, transportation construction, scientific and educational buildings, medical buildings and residential buildings, which do not promote the use of dynamic light illumination, even if some commercial buildings or the specificity of the building in the use of dynamic light illumination, also should pay attention to rhythm control, should adopt the gradual, slow approach to change the performance of the urban night lights and more artistic vision, comfort.

3. Select the appropriate LED lighting method

There are many ways types of urban lighting, LED lighting is just one way to carry out urban night building, only on the basis of different architectural features, characteristics, style and environmental conditions surrounding the analysis, choose the most appropriate way of lighting performance in order to create the most perfect city in night lighting effects.
LED lighting applications in the night there is a certain degree of selectivity, especially in the LED application of technology is not yet very mature cases, the application will be subject to certain restrictions, so night use should be carefully chosen, reasonable application. For commercial, entertainment, advertising LED lighting can be widely applied; for residential buildings at the top of the outline lighting LED lighting is a good way; use of LED light combined profile with the cast, cast illumination LED light source and the local set off each other, both the performance characteristics of building structure, but also the visual light can be more comfortable, a simple combination of blunt LED outline light cast wall wash light performance, not only highlights the line's performance practices, but also reflects the artistic mood lighting ... ... Therefore, the proper use of LED and other lighting method with an organic combination of right-rich city night atmosphere, city night vision to enhance the performance of power, will produce a more desirable, more comfortable artistic effect.

With China's rapid economic development, urban construction level night, as well as the continuous improvement of LED technology and applied technology research and development has matured, LED night in the city will appear in the application of a more broad prospects.