Urban Building Lighting LED Lights

In the development process of the information age, urban lighting affects people’s daily life in a subtle way, allowing more people to gradually realize the importance of urban lighting projects, especially LED lights play a very important role in urban lighting work. The classification and characteristics of LED power supplies are analyzed, and the application of LED lights in urban lighting projects is specifically discussed. In the rapid development of modern information technology, light-emitting diode technology, light-guide technology, sensor technology, holography technology, laser technology and laser technology are gradually being applied to urban lighting fixtures. The LED lights integrate these technologies into one, so that the urban lighting project exudes a modern atmosphere, so that the urban lighting project can not only give people a visual enjoyment, but also make people feel physically and mentally happy.

Development history and advantages of LED

LED light-emitting tube is a semiconductor light-emitting device that can convert electrical energy into light energy. Since the birth of the world’s first commercial LED in 1968, the performance and application of this product have developed rapidly. Since entering the 90’s, the luminous efficiency of LED has made a qualitative leap. LED lighting appliances are composed of LED light sources, electrical accessories and appliances. It uses semiconductor light-emitting devices as the light source. It has the characteristics of small size, long life, low energy consumption, instant startup, and rich colors. It is an environmentally-friendly and energy-saving cold light source.

1. The color temperature of the LED light source

The effect of lighting is inseparable from the lighting carrier. Considering the choice of luminous flux, color temperature, and color rendering of the LED light source, and taking into account the overall lighting effect, it is particularly important that the white color of the LED light source is Consistent color temperature, a few kilometers of guardrail light strip lamps are more difficult to maintain consistent light bars. When designing the color temperature parameter selection of the LED white light color, first consider the characteristics of the white light color, the relative light intensity corresponding to the light of different wavelengths, and the light distribution curve. The test system carried out random inspection of key technical indicators such as electrical parameters, light parameters, and color parameters. Secondly, in the design of circuit technology, the white light LED is reasonably matched with the constant current drive circuit, and the characteristics of the LED light source are adjusted to the extreme, so as to better achieve the light color consistency effect of the light environment design.

2. Tint of LED light

LED light-emitting diodes have a soft light color. It not only provides people with comfortable visual conditions, but also through the coordination of various light colors, presents the lighting style of the Qinhuai River water system, increases the aesthetics of lighting art, and achieves the lights created by design Atmosphere. In order to fully express the combination of modernity and simplicity of Yinmaqiao, white is used as the main color, the outline lighting of Yinmaqiao is used, and yellow and blue are used as auxiliary colors for flood lighting of the bridge pier to create a solemn and generous The light environment gives people an elegant feeling.

3. Color effects of LED lights

The use effect of color is mainly reflected in the physical effect, psychological effect, physiological effect, sign effect, heat absorption ability and reflectivity of color. In particular, different colors stimulate different physiological aspects of people and affect people’s different psychological feelings about colors. Because of its extensive contact with people in social life, color often forms a relatively stable social attribute. Red, often reminds people of the sun and fire, and gives people inspiration and excitement; white, often reminds people of ice and snow, cold, gives people a pure, cold feeling; yellow, with a noble odor, looks bright, soft, active, elegant ; Purple, noble and solemn; green, reminiscent of green mountains and rivers, symbolizing youth, peace and life. The rich colors give people a rich and durable aesthetic. Otherwise, even if the color is bright, but very monotonous, it will be boring and cause boredom. Harmony and unity are the highest requirements for color beauty. To achieve harmony and unity of various colors, attention should be paid to setting a tone, and all colors must obey this tone. In addition, it is necessary to correctly handle the allocation of similar colors and complementary colors, and the orderly arrangement of similar colors can play a harmonious effect.

 4. Design and selection of LED blue and yellow luminous angle

When selecting blue and yellow LED light sources, the light color characteristics of two different LED light sources must be fully considered, and consistency in flood lighting effects must be maintained. The blue light source uses a bullet-type light-emitting small-angle LED. One is to increase the light intensity of blue, and the other is that the blue light-emitting angle is small. Sex, increase viewing.

Factors determining the lighting effect of LED lights

The lighting effect of colored light is not only related to the color of the light, but also directly related to the illuminance. The same color light, different illumination, different human visual effects. Under normal circumstances, bright, saturated, and adequately colored lights will bring healthy, bright, dazzling, and magnificent effects, and insufficiently colored lights will cause varying degrees of negative effects, such as faint yellow light will emit a dim, warm atmosphere The dim red light will render an atmosphere of depression and horror, and the dim blue and green light will cause gloomy, secretive effects and so on. In addition, the floodlighting effect of the building facade is directly affected by the state of the material.

LED lights feature

1. LED module

The LED light source has low power and is driven by low voltage, which solves the heat dissipation problem of the ancient tower wooden structure frame without large heat accumulation and meets the requirements of fire safety.

2. Green lighting

LED light source does not have infrared and ultraviolet rays, will not damage cultural relics, the light source does not contain mercury, and will not cause environmental pollution.

3. Lighting method

The LED light source has a small volume and a very large design space. It can give full play to the characteristics of point lighting, surface lighting, line lighting and local lighting in the structural space of ancient buildings.

4. Lighting effect and maintenance factor

It is convenient to adopt a centralized network control system to achieve the dynamic chasing landscape lighting atmosphere of light colors, increasing the control ability and flexibility of the lights. LED module lamps have a long service life of up to tens of thousands of hours, low maintenance and maintenance costs for lighting facilities, and minimal management workload.

Practical application of LED lights in urban outdoor

1. LED lights outdoor lighting highlights

The beautiful light can create the atmosphere of the waterscape light, so a special-shaped lamp with an LED light source is selected. The outer side of the drinking horse bridge is outlined with strips of super bright white LED landscape decoration light. The linear features of the building are relatively rich in outline and form a white band of clear light at night. In order to reflect the firmness of the bridge pier pillar, the bridge pier facade adopts a prominent lighting method. The flat or right angles of the building pier, bridge, and bridge top plate are directly selected. Special-shaped LED lighting fixtures are selected for local processing to provide centralized lighting. Depicting the theme of embellishment: Qinhuai River’s “Sound of Sound and Light”. The special-shaped lamps with LED light sources will not generate glare under reasonable design conditions, ensuring that passengers on the cruise ship can watch the Yinmaqiao water system lights on the Qinhuai River.

2. Ancient pagoda LED light display

Ancient tower cornice arches and floor roofs are covered with a large area of U-shaped amber glass tiles. According to conventional flood lighting, long-range projection is used. There are no light-shielding measures for floodlights. Most of the lights spill into the air or the subject. In addition, light pollution is formed and a lot of energy is wasted. Therefore, a multi-group connection method of LED modules is adopted to form the principle of lighting the roof facade, creating the most delicate flooding effect of ancient tower buildings.

LED modules are evenly arranged along the outline of the eaves on the roof, and the building outlines at different levels are embellished. The single light emitting angle of the LED is 60 degrees, which can ensure the lighting effect of different viewing angles. The low-level structure of the bucket eaves of the eaves mainly adopts low-power flood lights to cast light from the bottom to the top. The main receiving surface at the bottom of the buckets is expressed by lights, which strengthens the three-dimensional layering of the building at night.

3. Lighting design and protection level

The artistic lighting design on the top of the tower adopts full-color discolored LED module lights, so that the full-color lights on the top of the tower are extended and changed by the axis in the night space, enhancing the sensitivity of the lighting climax. At the same time, the ancient tower in the light is reflected in the East Lake, and the light and water are integrated. Protection level: The structural design and appearance of D80 guardrail light strip is designed as D-type, which is convenient for on-site bridge construction installation. PC material is UV and aging resistant. Special seal treatment materials are used inside for technical sealing waterproof and heat dissipation technology. The sealing of the lamp organically combines the structural waterproofing with the waterproofing of the adhesive. The special high waterproof and anti-reverse cable plugs and connectors are selected to ensure that the lamp can reach IP65 protection level when used outdoors.

4. LED lighting control system

The lighting control of ancient pagoda adopts independently developed HDMX centralized network control and distributed control to achieve dimming, special effects, full-color discoloration, etc. The input voltage of the ancient pagoda centralized network control system is AC220V, and the output voltage of the power switch power reducer configured between the corridors is DC12V, which is connected to drive the LED module. The design control system can be divided into several modules: (1) The lighting circuit of the glazed tiles covered on the ancient tower building adopts PLC to control the yellow and blue jump of the LED light source, which changes every 15 seconds; (2) the ancient tower eaves Dougong ’s streamlined contour lighting circuit adopts PLC to control the yellow and red transitions of the LED light source, which changes every 15 seconds. The LED light source uses HP power chips with ultra-high brightness and a single power of 0.1W; The artistic full-color color-changing lighting circuit adopts the 89S52 single-chip microcomputer to control the gradual effect of full-color light, which changes every cycle for 2 minutes. In order to improve the use effect of the LED control system, the entire network control system is divided into several modules, which facilitates the centralized control system upgrade and maintenance and debugging in the future. It also greatly reduces the mutual electromagnetic interference between the control systems of each part, and improves the stability of the entire centralized network control system. safety.

Production of LED special-shaped floodlights: Considering the floodlighting of the bridge pier, according to the structure of the bridge building, a special-shaped luminaire with a difference of 10 ° ~ 15 ° between the light-emitting boards on the same horizontal line is designed. The stainless steel metal parts are folded into special-shaped channel steel, which can be made into a semi-circular arc or a straight bar shape. The 0.5W high-power LED light source that matches the reasonable viewing angles directly into the metal channel steel is packaged for waterproof technology. In the fixed way, the bridge piers and bridges are fully used to hide in the bridge buildings and integrate with the bridge. They are unified with the environment during the day and will not cause visual dissonance to tourists. LED special-shaped floodlights are light in weight, easy to fix, and safe in security. Therefore, it is feasible to use LED special-shaped floodlights to replace traditional lamps in Yinma Bridge.

Matters needing attention in the installation of LED lamps

As the Taiyuan area belongs to the north, the ultraviolet rays are strong, and the wind is strong. In the design of module products, a UV-resistant PVC engineering plastic is used. The system connection adopts sheathed cables to ensure the safe operation of the entire control system. Due to the large number of installation points of a single module, the number of modules is 50,000, which brings difficulties to the installation of the ancient tower lighting project. After consideration of the site, a special U-shaped mounting bracket was specially designed to reduce the amount of construction and to avoid the destruction of the ancient tower building improves the wind resistance of the module and is safer and more reliable.

Application of LED lights in urban indoor lighting projects

At present, the application of LED in indoor lighting projects is mainly concentrated in the field of commercial lighting, mainly decorative lighting.

1. Medium and high-end specialty stores, shopping malls

Energy-saving and environmental protection, no UV, cater to the psychology of some businesses to display personalized light environment, and become the preferred light source for some businesses to display certain special products; its full-spectrum color range is very suitable for the atmosphere of specialty stores and shopping malls, LED The advantages of light sources in local lighting, accent lighting and area lighting can create a high-quality light environment unmatched by other traditional lighting electric light sources, which is very suitable for the field of commercial lighting. At this time, price has become a secondary consideration.

2. Lighting of entertainment places and beauty salons

The LED integrated light source is full-color and easy to control, which can create static and dynamic lighting effects. Any color from white light to the full spectrum renders a strong entertainment atmosphere. The emergence of LED has opened up a new kind of space environment decoration design. Of ideas.

3. Atmosphere lighting in bars, cafes and other leisure places

The small size of the LED light source and solid-state lighting give the luminaire manufacturer unlimited room to play, and can professionally produce a variety of different styles. The full color of the LED and the dynamic and static lighting effects make it decorative and moody. Performed most vividly in this type of venue.

4. Lighting in professional places such as museums and art galleries

Museums, art galleries and other places are special occasions with high requirements on the lighting environment. The special characteristics of the display items require that the lighting source does not contain ultraviolet rays and no heat radiation. LED is a cold light source, and the light does not contain ultraviolet rays, which can fully meet the special requirements of museums and art galleries for lighting.

5. Stage lighting for dance and photography in commercial theaters, TV studios

The application of indoor lighting has explained a new concept to the lighting environment of theaters and studios. The following is one of the award-winning projects for LED applications in 2005: As a first-class British TV station, GMTV last year changed studio lighting to color-changing LED, reducing energy use in lighting by more than 60%, and reducing studio temperature the degree of comfort. Does not produce a 50-60Hz flickering TV image, which makes studio changes practical. Color-changing down lights, bird-like decorations and color-changing ribbons create unique colors and logos for different program segments. Fluorescent accessories provide conventional and backlight support for LED installation. The system is expected to yield equivalent returns in 39 weeks.

6. Hotel and guesthouse lighting

The use of LED products in the lighting of hotels and guesthouses, either in the lobby or in the guest rooms, brings a different feeling to customers. In addition to saving energy, it can also show luxury and warmth. For the owners, the personalized light environment can fully show the strength of the company

7. Meeting room, multi-function hall lighting

The intelligently controlled LED gray can be adjusted, and the lighting environment of the conference room or multi-function hall can be adjusted according to the different conference content. It can be freely set for serious or lively.

8. Lighting for exhibitions and fashion shows

Exhibitions and fashion shows are venues for businesses to showcase their products and services. For businesses, in order to better attract customers, sell products and finally reach a cooperation agreement, they need a personalized light environment to showcase their products and services. LED are very useful in exhibitions and fashion show lighting.

9. Living room and home theater lighting

The color of the LED lights is used to bring out a warm, harmonious, and warm atmosphere, reflecting a comfortable and casual atmosphere. Led application explains another meaning for home lighting.

We look forward to the increasing importance of LED in the lighting field, and more and more LED entering the lighting field. As described in this article, in terms of landscape lighting design and application, LED light sources have more unique advantages. We can be confident that LED landscape lighting will follow the path of cross-disciplinary integration and high-speed landscape art, intelligent technology Development, LED will create unlimited business opportunities for various industries. People are using technology and wisdom to decorate the night sky of the city, opening up new ideas for urban beautification lighting, making city life better and city lights warmer.