日期：2012年5月8日

How to Solve Problems Hide behind the Excessive Development of China types of led lighting?

Recently, regardless of the mainland or abroad, the LED lighting industry is in rapid development, but behind the rapid development Chinese LED lighting products has exposed the lack of core technology and innovative capacity, disorderly competition in the market and other issues. Specific performances are as follows:

How to Solve Problems Hide behind the Excessive Development of China types of led lighting?

Firstly, as for the output value, the current mainland types of led lighting market penetration rate is only 5%. Relying on imports of core technologies and higher overall cost, which becomes a stumbling block to hinder the further development of LED industry. The LED chip is like the engine of a car. Lack of core technology will be directly restricts the development of this industry. It is understood that the LED upstream chip production technology lies in the hands of foreign companies, and the slower the process of domestic technology affects the development of the industry. MOCVD epitaxial furnace and its related technology, on behalf of the most high-end of the LED Street Light industry chain, mainly depends on imports,  which greatly restrict the cost control of the LED industry upstream.

Secondly, as to the overall level, the gap between China and the international-class is still about two years. Many developed and developing countries or regions in the world are accelerating the development of semiconductor lighting technology and industry. On technology, China is in the second echelon.

Thirdly, blind investment and the lack of core technology lead to the imbalance development of LED lighting market. Inconsistent quality is also a common issue for LED enterprises. The types of led lighting market exists a lot of small and medium-sized enterprises to produce low-quality products, and the industry pattern is unstable.

Fourthly, with international giant companies entering into the Chinese market, lots of enterprises with core competitiveness in mainland will face the risk of M & A, while enterprises lack of competitiveness may be eliminated directly. If we do not regulate the market, Chinese LED Lights market may degenerate to a wedding dress maker for foreign lighting giant.

According to the analysis of a number of experts, recommendations are as follow:
Strengthen the guidance of government planning on the whole types of led lighting, and carry out enforceable national industry standards as soon as possible, especially related products in the industry standard in the demonstration project, such as street lamps, tunnel lights, display, landscape lights, so that it can provide procurement of local governments and enterprises, standard to follow.

Common problems for LED flat panel light

As for residential LED lighting, LED flat panel light is more feasible than LED bulbs. They are more sophisticated since they have higher light efficiency, better cooling system and more beautiful.

 

Nowadays, most LED panels are side-lighting lamps. LED chips are mounted evenly on the four sides of them. Most of the lighting from light sources will be reflected by diffusing board mounted at the back of LED panels. They look really good, very suitable for indoor lighting and decoration. However, in point of energy saving and environment friendly, this type of lights are not advisable.

 

As for residential LED lighting, LED flat panel light is more feasible than LED bulbs. They are more sophisticated since they have higher light efficiency, better cooling system and more beautiful.

 

There are a lot of disadvantages of LED panels.

  1. The normal lighting effect of LED flat panel light is around 70lm/W. In other words, this light cannot save more energy than traditional fluorescent lamp. Customers will not choose them just for the purpose of reducing electricity consumption.
  2. As we mentioned before, LED panels need the help of diffusion broads. All of them are plastic products, which will produce toxic gases in high temperatures. Although the normal working temperature of LED flat panel light is much lower than the threshold level of making diffusion broads send toxic gases, this potential risk should not be ignored. Meanwhile, disposing these plastic products is also a big trouble.
  3. LED panels are only suitable for spacious rooms without any suspended ceilings. Therefore, LED flat panel light rarely used in residential lighting applications such as LED Street Light . Usually, they are used as a kind of office lighting.

 

However, a new type of LED panels appeared in LED lighting market recently, which solved most of problems mentioned above: Back-lighting LED panels. Since all of the light sources are mounted at the back of this type of lights, there is no need to use diffusion broads. And also they are thick enough to use better cooling systems. In many ways, they are more sophisticated than side-lighting LED panels. The only disadvantage of back-lighting LED panels is that they are heavier and occupied more space than side-lighting LED panels.

 

Overall, LED panel is a big process. They are no longer restricted by traditional design, like LED bulbs. Its form is more suitable for LED light sources.

Embarrassing situations for residential LED light bulbs

Compare with traditional bulbs, LED light bulbs have many different properties:

  1. LED chips are very small. They can be integrated together constitutes the light source of a LED lamp
  2. LED street light cannot work in high temperatures. Normally 70-80 degrees are most suitable working temperature for LED chips. Thus cooling system is very important for LED lights. Cooling systems for high power LED lights, like LED high bay lights, requested high heat dissipation capability. Relatively speaking, small LED lights only need common cooling systems, like residential LED light bulbs.
  3. The beam angle for LED lights is much small than that of traditional lights. Thus in practical applications, light redistributions need to be considered.

 

The power consumption of residential LED light bulbs is 3W, 5W and 7W. In fact, LED bulbs within this range perform much worse than 40W-60W filament blubs.

 

Photo above shows a typical form for LED blubs. Basically adopt the design concept of traditional bulbs. However, this design is improper for LED lamps. Indeed, residential LED light bulbs designed as this form are more beautiful than other formed LED tubes. This beautiful appearance is at the cost of the sacrifice of heat dissipation ability. In order to make this shape, designers have to reduce the volume of cooling fins. In accordance with today’s LED manufacturing technique, a LED bulb does not look brighter than a traditional filament lamp with similar power consumption. However, high power LED bulbs is hardly to be realized, since they cannot work in high temperatures. The power consumption of residential LED light bulbs is 3W, 5W and 7W. In fact, LED bulbs within this range perform much worse than 40W-60W filament blubs. It is impossible to use them as main lighting tools. Think about your living room looks like a movie play room during the night, you won’t like this image. They can only be installed in the bathroom or passageway as an auxiliary lighting source.

 

It is really an embarrassing situation for residential LED light bulbs, and also the main reason why LED bulbs cannot widely spread like LED down lights and LED panel lights. If you have no request in brightness, and you are looking for a method to reduce your outrageous electricity bills, you can try to install some of these LED bulbs in your bathroom, bedroom or even in your living room. But you can expect a bright living environment.

 

However, salty fish also cab break up unripe. If LED manufacturing technique can get further improvement: more efficient cooling method or higher lighting efficiency, there is no doubt that LED bulbs will replace traditional tubes in indoor lighting area.

China’s power led lamps trading environment has improved

With the western development and living standards improved a lot, it will lead to LED Products market becoming increasingly prosperous in the near future.

In the first grade city, power led lamps in department stores, supermarkets are increasingly luxurious. With the upgrading of the consumption level, people who purchase lamps are no longer just to meet the needs of lighting, but to create a better shopping atmostphere. They are paying much attention to the scene display, store decoration and the products are more and more upperscale, luxury, which is obvious in the area of east, south, north and other places.

China's power led lamps trading environment has improved

The second and third grade cities are risen gradually. In the east and south China region, a number of perfecture-level cities and county-level cities are economically developed, where the professional and stores, decoration quality are rising. For example, in Huzhou, zhejiang, the business area of 5000 square meters of lighting supermatket opened at the end of 2009, and became the first store in Zhejiang Province.

The power led lamps in the second and third grade city are continue to rise up. It provides much convenience for the local lighting consumers. A lot of consumers who originally go to big city to purchase light are directly choosing to buy at local. Also, it stimulate the local LED lamp consumption.

With the Project launch of the “China Green Lighting Project”, the 13 departments of the State Economic and Trade Commission jointly organized and implemented aiming at saving energy, protecting the environment, improving lighting quality activities. “Green light” refers to highg efficiency, long life, sacurity and performance through the science of lighting design to improve the way that people work, study, living conditions and quality purposes, therefore, creating a efficienty, comfortable, safe, economical and beneficial to the environment, in order to reflect the lighting of modern civilization.

At present, LED street light are on the pioneering phase in the market. The price is a little high, and unknown to the widely customers. But the market potential is huge. On account of its many advantages, for example, eye protection, energy saving, environment protection and long life. It can be estimated that in the near future, with the declining cost of high power LED lamp, the market of power led lamps will have a broad development.

 

Shape designs for T8 LED light tubes

T8 is a code represents a type of tubes with diameters of one inch. T8 LED light tubes are mostly used LED tubes at present. Although the light efficiency of LED light sources is much higher than before, there are still some difficulties in replacing traditional fluorescent tube directly by LED tubes. In accordance with lighting standard of fluorescent tube, a 36W traditional tube should at least have a luminous flux of 2400lm. At present, among T8 LED light tubes, the highest luminous flux is around 2200lm (with a power consumption of 21W). However, cooling system of this kind of tubes cannot be contained within semi-circular pipe but trapezoidal pipe which provides larger spaces. In today’s manufacturing technology, it is impossible to create a T8 LED tube with trapezoidal-shaped cooling components. Cooling system will be the bottleneck for high power T8 LED tubes. According to present lighting efficiency of LED lights, T8 LED light tubes with a luminous flux more than 2000lm will suffer cooling problems. This type of lights cannot work for a long time and more prone to failure. Commonly used T8 LED tubes have a luminous flux of 1300lm-1500lm. This type of LED tubes cannot be used to replace traditional fluorescent tubes. This is a main reason why LED tubes are hardly to be accepted by customers. Many buyers complained that their rooms looked much dimmer than before.

 

T8 is a code represents a type of tubes with diameters of one inch. T8 LED light tubes are mostly used LED tubes at present.

 

In addition, LED tubes tend to follow the step of fluorescent tubes: becomes more and more thin. T5 LED tubes started to emerge in lighting market in few past years. However, this kind of herd behavior is totally wrong. It is an inevitable trend for fluorescent tubes, since a thinner tube can dramatically improve the lighting efficiency of a fluorescent tube. But situations are totally different for LED tubes. The thinner the tube, the harder for the heat dissipation. Meanwhile, spot phenomenon is inevitable if light sources are too closed to the cover, which will reduce light transmission ability of the cover, and consequently the high lighting efficiency of LED lights.

 

Designs of T8 LED light tubes should not be restricted by traditional ideas. Normally, places in which tubes are installed have larger space. It is uselessly to use thin LED tubes, just for a beautiful view? It is unnecessary. Our design object is to satisfy customers’ brightness requirements together with suitable cooling systems.