月份：2012年5月

LED light consumption only half as much as that of traditional light?(2)

Generally speaking, LED lighting source can emit single direction lights. Super-narrow beam angle design typically used in flashlight applications should not be taken into account. Here we just think about general LED lighting applications. In fact, LED lighting sources used in general LED applications cannot send out 100% single direction lights. There are more or less some lights will be emitted into other sides. After packaging, LED chips even emit light from back. This has nothing to do with the workmanship, materials or quality of LED chips. In widely used LED applications, engineers need to invent projectors with high light-reflecting rate to help reflecting this backward emitting light. No matter what type of material people used to produce projectors or other light reflecting covers, it is inevitable for optical energy to be wasted. But LED light consumption is indeed reduced.

 

Generally speaking, LED lighting source can emit single direction lights. Super-narrow beam angle design typically used in flashlight applications should not be taken into account.

 

We are going the make a small comparison in intensity of illumination between traditional energy-saving lights and LED lights. Feature above shows the different luminous flux between traditional energy-saving lamps and LED lamps (blue line represents the luminous flux curve for energy-saving lamps and red line represents the luminous flux curve for LED lamps). From this picture we can see that the luminous flux of energy-saving lights within 1 meter is approximately 584lm, while that of LED lamps is around 595lm. The luminous flux of these tow lights are similar (The advantage of LED lights is insignificant). All of them are installed by projectors with same reflecting factor. However, when senses held in a distance longer than one meter, LED lamps perform worse than traditional energy-saving lamps. It is obvious that traditional lights can be replaced by LED lights that only consume half power.

 

LED light consumption only half as much as that of traditional light is incorrect. Not only in LED down lights, but also in other LED lighting applications, like LED tubes, LED bulbs, LED high bay lights, LED street lights, this theory cannot be proved. However, without thinking of the reflecting effect of projectors, LED lights consume much less power than traditional lights to have same luminous flux. But the total light consumption is still more than half of traditional lights.

A Light Analysis of LED emergency lighting products

From outdoor to indoor, specialized to generalized, the application of LED high bay is expanding in lighting area. The industry is generally optimistic about medical lighting, led emergency lighting products,  and plant lighting market. Research institutions predict that from 2010 to 2017, LED surgical lighting applications are expected to be high growth rate of 76.4 percent a year. Many companies make efforts to march to the medical lighting. However, compared with the general lighting, medical lighting has a certain degree of particularity in terms of lighting demand or market access.

Where is the medical lighting market access condition at present? How big is the market capacity of medical lighting? How can enterprises find gold in this special led emergency lighting products market? This article will take operation shadowless lamp as point example to explain on the development of domestic medical lighting and market capacity and so on.

A Light Analysis of LED emergency lighting products

First, where needs the medical operation shadowless lamp?

• The second grade or above Hospital (the total number of hospital beds 100-499) has the needs to purchase medical and surgical shadowless.
Some economically developed and coastal towns such as A, B grade hospitals are equipped with operating rooms and have the demands for medical surgical shadowless lamps and LED Products.

1, Medical led emergency lighting products devices are classified into:

Class I: conventional management is enough to ensure its safety, efficacy.
Class II Medical Device: safety, efficacy, should be brought under control.
Class III medical devices: for implanted in the body, to support, sustain life; potentially dangerous to the human body, its safety, efficacy of medical devices must be strictly controlled.
Medical and surgical shadowless are belong to Class II medical device management; belong to the operating room, emergency room, exam room equipment and apparatus.

2, Different hospital grades, different lighting needs
Basing on Hospitals Hierarchical Management promulgated in 1989 by the Ministry of Health, the LED factory lighting are classified into different levels; according to different functions and tasks hospitals are divided into first, second, third grades; each level is divided into A, B, C, three classes; A is the highest in every grade; add Principal class in three grade; the hospital is divided into three grades ten classes. The third grade A class is the highest level in domestic hospital, the equivalent of five-star hotel.
The third grade A class on behalf of the hospital own the biggest scale and highest skills in and the most authoritative in the rating hospital hospitals.

What is the efficient architectural solar powered led lighting?

Right now, Chinese LED lighting Products consumption accounts for almost 12% of the electricity. Lighting consumption almost accounts for 19% in the global content. Energy conservation has become a demand of the global world, many manufacturers hope to find more energy-efficient light, but energy-saving is not the only indicator. “LED is not the only lighting, the lighting also has a good purpose.” “forum held on the afternoon of April 26, 2012, fromFudan University, Professor Chen Yuming said, due to  LED develops so fast, a lot of other lighting and advantages are coated. Between the solar powered led lighting, fluorescent lamps, ceramic metal halide, incandescent, oled, and many other light sources, there isn’t exist any difference. The key is where does this light source come from.

There is no doubt that LED should be a very important and promising light source. LED luminous efficiency has been greatly improved, the CREE laboratory level has reached 254lm / W. In addition to the luminous efficiency, the entire system of LED lamps, such as luminaires, intelliegent control, power and other factores may play an important role on the application of solar powered led lighting. Currently, LED light source also has a long way to go.

The present white LED are sparkled by the blue lights and added yellow fluorescent powder, it can extend the product color index more than 90 by the red band. But compared with the sunlight, the white LED spectrum of light in the 480mm range exists little, and in a wider area, which can affect the human biological clock.

But it does not say that LED is not good. We need to address the problem and solve the problem of intermediate spectrum missing. Right now, many munufacturies remedy the spectrum missing by phosphor technology, or by UV LED, the zinc oxide as a media and other ways. “If the LED spectrum have been made up, the promotion of solar powered led lighting is not the price problem.

The price is never a problem. Once LED street light has a real large-scale mass production, a light to spend few dollars will not be a problem. The biggest problem is that you can actually meet the needs of lights. That will be the target problem which dominate the marketing.

LED light consumption only half as much as that of traditional light?(1)

In recent years, many people raise doubts about the energy saving function of LED lights. Does LED light consumption really half as much as that of traditional light? Theoretically, this can be realized: traditional light source is full-angled (half of which is useless light), while source for LED light is half-angled (none of which is useless light). However, this theory is too subjective to be used. Obviously, people who presented this theory had little acknowledge of LED applications and LED lamps.

 

In recent years, many people raise doubts about the energy saving function of LED lights. Does LED light consumption really half as much as that of traditional light?

 

Under what circumstances traditional light sources are considered as half efficient?

  1. There is no other lamp tool, like projector, during the installation. The light on the opposite side is directly emits to sky.
  2. The back of the light source is a rather high ceiling with very weak light reflection capability.
  3. The internal side of the lamp is completely black, all the light emits from the back will be absorbed totally.

 

However, in practical lighting applications, reflection lamp tools (projectors) are necessary for different purposes. In order to fully use the light, the internal of projectors will be mounted by all kinds of instruments with light reflection functions: lens reflection or diffuse reflection. Even for those filament lamps used in a very early age (with no reflection lamp outer covers or projectors), the reflection rate is as much as 70%. Most of the light would be reflected though ceilings and walls, if they had smooth surfaces. Nowadays, fluorescent lamps are widely used all over the world. This type of lights has no specialized projector, still using walls reflecting.

 

Even traditional lights have no effective projectors like LED lights does, they still can reflect most of the light emitting by light sources. However, LED lights which have been designed applying projectors with pretty high reflecting factor cannot 100% reflect the light coming out from light sources. However, it is cursory to judge that LED light consumption only half as much as that of traditional light is incorrect. It is not a problem as simple as “whether the earth is round or square?” Reflection ability is part of the optical-energy-converting efficiency of LED lights. There are many other aspects need to be considered. For example, LED street light itself has very high converting rate from electricity energy to optical energy, which contributes most of its much lower LED light consumption.

LED light growing too fast to lead the malformation of industry chain

For the development of LED lighting business in China, experts indicated that LED light growing so fast in China that hard to be digested by market. The number of enterprises entered into this field sharply increased, leading to the confusion in the market. Many LED lighting applications applied to commercial purpose. Most of the ordinary family cannot afford these due to their exorbitant prices, which restricted their popularity among mass consumers. “If the price can be reduced more than 30% on the existing basis, LED lights will take much more occupations than now.” said Sunyi zhang, a market analyst from Shanghai Jinghua lighting technique Co., Ltd. Thus how to improve LED lighting technology, increase products qualities, reduce cost of production, became the key to the prosperous of a LED enterprises. However, LED light growing too fast to let these be realized.

 

For the development of LED lighting business in China, experts indicated that LED light growing so fast in China that hard to be digested by market.

 

Nowadays, abnormal developments have appeared in LED lighting business. Disconnections frequently turned up within the entire industry chain. Merchants for raw materials tended to stock up their products, raise prices and create monopolies. This leaded to a rather bad situation that LED manufacturers had to increase prices of their own LED lighting products or even worse reduce the cost of production by decreasing products’ qualities. However, a lot of business men were blinded by the illusory profit of LED lighting industry. More and more LED manufacturers cannot wait to jump into this fire. The immediate consequence is that they have to further drop their cost of production, producing products with very poor qualities. Too fast LED light growing will let this embarrassing situation keep on going for a long time. Blind investments coming from downstream have greatly compressed the profit margins of LED lighting market. The more fierce of competitions, the more narrow of the market profit margins. Price battle impact a bad effect on an emerging market, like LED lighting market. It will weak the international competitiveness of a company to some degrees, and disrupt the entire market at the mean while.

 

At present, the global LED lighting industry has been carved up by three regions: the United States, Europe and Asia. Japan, Korea and China are three main competitors in Asia. How to improve the international competiveness is much more important than how to occupy domestic market in an unscientific way. We do not want to see that in near future China LED street light would lose its competiveness in Asia and also in the world.

Problems for LED street light bulbs

At present, the commonly used color temperature for LED street light bulbs is around 5000K (Cool White). However, as for a road lighting system, a light color with 5000K will make pedestrians feel cold, and also reduce farsightedness ability of drives. Some experts even believe that street lights with a temperature higher than 4500K will increase the number of traffic accidents. The most suitable color temperature for LED street lights is around 3000K (Warm White or Yellow White).

 

Without these unnecessary cost for maintains, Chinese LED manufacturers would had more money for developing LED street lighting technology. How to get out of this wrong region, that all depends on what policy will be put in place.

 

However, even cool white LED street lights has been replaced by warm white LED street lights, problems still exist within LED street lighting business, due to the lack of an identified technique standard. LED lighting business has been developed nearly ten years in China, but still lack of unified technical standards in product specifications, including color temperature, working time, product dimensions, etc. Each manufacturer produces products in accordance with their own standards, leading to market confusion. Taking color temperature for instance, same LED street light bulbs with same color temperature (3000K) will have distinguished color if they from different manufacturers. Sometimes, this difference is obvious. Without any identical standard, it is impossible for products to be generally used. For example, a certain local government decided to use LED street lights from one manufacturer in a road-lighting project. After several years using, some of these lights are broken, they only can be replaced by the same products from the same manufacturer. In other words, lacking of an identified standard among LED manufacturers reduces the flexibility of LED products, at least making the update and replacement of them become more difficult.

 

Lighting rate is a rather important examining aspect of related department. According to Chinese present manufacturing technology, broken LED street light needs to be replaced entirely instead of partly. It is very bad for Chinese LED manufacturers. In order to reduce the fault rate, they have to raise their cost of production, as well as perform long-term maintains. And it is also a bottleneck which blocks the spread of LED street lighting business in overseas market. No one would like to use street lights can only be replaced entirely when they are broke down. Meanwhile, it blokes the development of LED manufacturers. Without these unnecessary cost for maintains, Chinese LED manufacturers would had more money for developing LED street lighting technology. How to get out of this wrong region, that all depends on what policy will be put in place.

Small companies have little chance in outdoor LED landscape lighting business.

LED lighting industry has a wide developing prospect in Nanjing. At present, there are more than 20 LED dealers in Nanjing lighting market, only one of which is dealer for outdoor LED landscape lighting. LED Lights is still an emerging market in Nanjing, thus local brands dominated Nanjing LED lighting market. Large-scale projects are generally contracted by several LED enterprises. Small and medium-sized companies are vulnerable in fierce competitions. That is the main reason why a lot of merchants had to give up the outdoor LED landscape lighting market. However, this cannot be an obstacle for the rapid development of outdoor LED lighting business in Nanjing.

 

Market for outdoor LED landscape lighting are very small, and also with a narrow channel. Export is another important channel. But only competent LED enterprises can afford these.

 

Apart from Nanjing, LED street light is also an emerging market in most cities in east part of China (except for Shanghai, in which LED has entered a highly developing stage.) In these regions, LEDs are mostly used in household lighting, landscape lighting, residential lighting and office lighting. After years of developing, the price is transparent and the market is stable. However, most of these cities met with the same problem that happened in Nanjing market: small merchants had no competitiveness in outdoor LED landscape lighting business. They did not have enough strength to take over large-scale projects. Some merchants appealed for alliance, but only few of them respond.

 

At present, only eleven LED merchants in Hangzhou, none of them are dealers for outdoor LED landscape lighting. “There are a lot of risks.” Said one dealer in Hangzhou Chunyang LED lighting market, “Now, we just want to focus on small LED lights business. Providing LED lights to large-scale products is really attractive. But it is the meet that too big to be swallowed.” There are more than 120 shops selling LED lamps together with traditional lamps. LED lighting is treated as a secondary business. And most of them are only selling small LED lights (LED spotlights, LED down lights, LED tubes and LED bulbs). Market for outdoor LED landscape lighting are very small, and also with a narrow channel. Export is another important channel. But only competent LED enterprises can afford these. They have enough capability to research and develop their products, providing sufficient and valid certificates which are strongly required by overseas buyers. Abroad large LED lights market has been carved up by several LED giants in China. Small and medium-sized companies can only pay their attention on small LED lighting business.

Form a concerted effort to promote the green LED lighting of street solar light

Recent years, we are steadily pushed forward the urban green lighting,  so that urban lighting facilities have been improved a lot. To develop urban green lighting, promote urban energy saving lighting have widely become a society-wide consensus. Up to the end of 2010, China’s 655 cities have a total of more than 1800 thousand street solar light, about 40% of the electricity for urban lighting electricity consumption of the entire society. On the “Eleventh-Five-Year” period, the  semiconductor lighting on the development and application of urban lighting has spread fastly. According to the relevant research statistics, the share of semi-conductor light source in the urban landscape lighting accounts for 70%, and the semi conductor street lights accounts for 9% of the total street lights. The “12th Five-Year period China’s economic growth targets will increase to a sustainable development, green lighting will become an important part of national industrial restructuring. At the same time, China is curently in a period of rapid development of urbanization. The populazation of urban city have increased of more than 10 million, and the annual growth rate of street solar light is 120-1500000. This process will last about 25 years or even longer. If we change the new lights in the urban city to LED street light, some of the old street lamps and landscape street lights to LED street lights, the potential and development prospects are very impressive.

In order to promote China’s urban lighting, the National Housing and Urban-Rural Development Ministry has issued the 12th Five-City Green Lighting Plan” clearly pointed out to further promote the urban green lighting in the 12th Five-Year period, to improve the lighting level of quality and energy efficiency, and to reduce lighting energy consumption , to accelerate the development of semiconductor lighting renewable energy and other new products in order to achieve the development pattern of urban lighting of street solar light.

Currently, we are actively developed the policies and measures to promote the development of green building and LED Spot Light.  The demand for green buildings and green lighting, and LED, new energy and new technology will be largly needed. International market demand and domestic policy, guidance, andwill become a key factor in determining LED growth rate.

The development of green lighting is the future direction of one of the key technologies of the lighting application. Green building development will greatly enhance the demand for semiconductor lighting source. We believe that the formation around the green lighting will accelerate the advention of spring.

 

Analysis of internal LED vehicle lights (2)

Instrument lights may be the most commonly used internal vehicle lights. Using LED lighting applications to replace traditional instrument lights can dramatically reduce energy consumption, making a big difference. Thus LED instrument lights became the concentration of many domestic and overseas vehicle manufacturers. As in internal LED vehicle lights, energy saving is the primary object just like LED Street Light. However, in addition to the energy-saving function, internal vehicle lighting is also judged in the categories of most reliable and most aesthetic designs. Same as traditional instrument lights, LED instrument lights are mounted on the dashboard for lighting instrument pointer and scale plate, normal power of which is around 0.5W. Instrument lights are generally connected with indicating lights, license plate lights. When indicating lights or license plate lights work, the corresponding buttons on the instrument panel will be lightened to inform the driver. Some instrument lights’ luminous intensity can be adjusted. With the development of intelligent lighting technology, more and more sophisticated user-friendly design will appear in vehicle lighting.

 

LED vehicle lights can use LEDs to convert electrical energy into luminous energy, dramatically drop energy consumption (only 1/10 as much as traditional vehicle lights).

 

Commonly used internal vehicle warning/indicating lights are oil pressure warning lights, excessively high water temperature warning lights, charging indicator lights, direction indicating lights, high beam indicating lights, etc. These lights can all be replaced by low-power LED lights. Warning lights are red (easier to attract attention), and indicating lights are green and blue. Normally, warning/indicating lights are mounted in the front of cabs, beside the instrument lights. As another important internal LED vehicle lights, LED warning/indicating lights enjoy a lighting status second to LED instrument lights.

 

LED working indicating lights are a kind of auxiliary internal LED vehicle lights, rarely used in daily driving, but necessary when cars broke down. LED working indicating lights are movable, often with a hook or clamp plug (a little cigarette lighter-type plug). The power comes from cars’ generators or batteries. The general power consumption of these lights is 21W. They have very high brightness, thus requiring a good cooling system.

 

LED vehicle lights can use LED High Bay to convert electrical energy into luminous energy, dramatically drop energy consumption (only 1/10 as much as traditional vehicle lights). As a result, it can more effectively save fuel consumption, keeping car circuits from burning by excessive loads.

Analysis of internal LED vehicle lights (1)

Commonly used internal LED vehicle lights are down lights, reading lights, door lights, stepping lights, instrument lights, dashboard warning lights, etc.

 

Cars and trucks are generally set up one down light. In addition to the function of internal decoration, LED Down Lights can monitor car doors and keep on lighting when doors are not closed (just like a visible alarm). The general power consumption of LED down lights is 0.5W-2W. LED Down lights for buses need higher power consumption (2W-3W). In addition to the higher light condensation, another advantage of LED down lights compare with commonly used energy-saving down lights is that LED down lights have a stronger cooling function.

 

Commonly used internal LED vehicle lights are dome lights, reading lights, door lights, stepping lights, instrument lights, dashboard warning lights, etc.

 

Reading lights, as its name implies, typically used to make driver or passengers more convenient to read word materials. LED reading lights are installed in the front of crew seat, less than 50 cm from the user’s head, usually with a 45 degree angle. A certain degree of light condensation is required by these lights, since a higher light condensation will reduce the blindfold reaction of readers. Normally, LED reading lights have a small beam angle, not very high lamp flux, some of them can be manually adjusted. Users can adjust the lighting angles and lighting intense by pressing buttons beside the light. LED reading lights are one of commonly used internal LED vehicle lights. The general power consumption of LED down  lights is around 5W. Similar to LED downlight, LED reading lights have a better cooling function. This advantage is obvious in the condition of long-time lighting. Users no longer need to sweat to view the map in hot days.

 

LED door lights are lights in between internal LED lights and external LED lights. However, people used to classify them as internal LED vehicle lights. They are typically installed in the bottom of internal car doors. When door is open, LED door lights will be lightened, emitting a red light to attract other pedestrians and drivers attention, avoiding accidents. When door is closed, they will go out.

 

LED stepping lights are only installed in large and medium-sized buses, rarely appeared in small cars. It is a kind of lamp with service function. When passengers intend to get on or get off bus or couch during the night, LED stepping lights will be lightened.