作者：Blade

Mains led lights voltage and junction temperature

 

Mains led lights voltage and junction temperature

 

However, in the discussion of the theory, usually about the PN junction refers to the ideal knot. In an ideal junction is not considering its bulk resistance. In the actual device, not only the memory of the PN junction region in resistance, the body region in a semiconductor material existence of resistance, resistance exist in the contact surface of the semiconductor material and the outer electrode, the electrode material for the existence of resistance, the electrode material and the outer lead exposure exists resistance, outer lead existence of resistance, and so, in fact, there are a lot of resistance. Voltage temperature characteristics of led high bay light is a positive function. The actual measurement of an LED VF not only is the PN junction barrier voltage EPN, but also includes the resistor voltage. This had an impact on the actual voltage – a function of temperature between.

Usually in the Test mains led lights voltage – temperature relationship in a static thermostat, give LED for into a transient current, and read the voltage value within a very short time. The purpose of this approach is to exclude the current the voltage drop across the resistor. Small current test results, does not reflect the voltage of the mains led lights in the normal current – temperature relationship. A large current, the parasitic resistance can not be ignored. Current increases, the higher the temperature the greater the voltage drop on the parasitic resistance. And the voltage on the parasitic resistance is a function of temperature, the voltage on the parasitic resistance with increasing temperature will be significantly offset by the PN junction voltage drop.

The global LED task lighting specifications are starting to implement

 

The global LED task lighting specifications are starting to implement

 

With the LED after another import indoor and outdoor lighting market, LED lighting prices have also dropped significantly, but the quality is poor also lead to many problems, it was noted around one after another set of LED lighting specifications, a number of mandatory lighting standard from 2012 onwardsthe road is expected to accelerate the vicious competition eliminated inferior, thereby bringing about the LED task lighting market reshuffle effect.

 

LED lighting applications has become increasingly common and diverse, the Taiwan Ministry of Economic Affairs’ Bureau of Standards in recent years have worked a number of LED lighting standards, norm-setting pace of following LED street leading countries in the world announced the end of 2010, enacted three common LED interior light standard, including LEDT8 straight tube lamp, LED Spotlights light steel frame light (including flat-panel lights), the industry pointed out that the relevant standards has been set, but the led high bay lamp after years of promotion, until 2012 is expected to expand the installation, as the Government import slowly add to budgeting operations, is estimated to be 2013 to 2014 is expected to release procurement tenders.

 

However, due to regional differences in climate and environment is too large, industry standards have not yet entered the national standards project despite the development of LED industry in full swing, by province respective dominant promote regional LED task lighting standards established, but according to the Development and Reform Commission recently LED lighting technical specifications, indoor LED downlight is expected to grant financial program technical specifications finalized in 2012 under the impetus of the continent’s second Five-Year plan, the Central announced LED interior lighting is expected to expand the implementation of priority projects.

Listed speed packaging companies of led yard lighting will be eliminated

Listed speed packaging companies of led yard lighting will be eliminated

Although the Development and Reform Commission has officially released the “China to phase out incandescent route map, and will be from October 1, 2012, prohibit the sale and import of 100 watts and above the general lighting incandescent, but this does not mean that last year, led high bay once by the LED will benefit from the favorable capital markets.

The high cost of the popularity of urban and rural temporarily reality

“At present, out of incandescent but also fail to LEDs, the LED current costs are still relatively high. Xuhuai, the Secretary-General of the China Illuminating Engineering Society,” China to phase out incandescent road map “after the release, led yard lighting immediately triggered the LED stock rose, I think it is not very rational.
Xuhuai is made as stated above in the press conference held in Beijing on February 8 “TM – Come out incandescent”.

By the end of 2010, the penetration of efficient lighting products in China has reached 80% penetration rate of energy-saving lamps in 2010 than in 2009, an increase of four percentage points. In contrast, the popularity of the city work better, the China market, there are approximately 1.3 billion incandescent, of which about 10 million in rural areas.”

Incandescent lamps with the exception of a few hotels, most rural families to allow them to dozens of dollars LED replacement a few dollars incandescent, I am afraid there is no financial subsidies is impossible. “Xuhuai.

According to Philips (China) Investment Co., International Liaison Director of Ye Ming, China’s LED market applications is undeniable that already lead the world, is the fastest growing countries. Based on this, he believes that “as an explosive development of the industry, the LED will eventually replace other light.”

However, some analysts pointed out that China’s achievements in the application on the market mainly due to the “10 City, 10000” program. “Ten City, 10000” pilot urban research statistics, led yard lighting the 37 pilot cities have implemented a demonstration project of more than 2000 applications, LED lamps more than 4.2 million.

In this regard, China Illuminating Engineering Society Deputy Secretary General Liu Shiping said: “80% of the continent the street is a high-pressure sodium lamps, the luminous efficiency of 120 lumen s / watt, itself a high luminous efficiency, the development of more mature and LED trying to replace high pressure sodium, to his demanding led yard lighting LED experiment life of 20,000-30,000 hours, a single sodium lamp life of 12,000 hours is sure to ensure. ”

According to Liu Shiping, a 400W high pressure sodium lamp, and even the power is not more than 1000 yuan, but an alternative to 400W high pressure sodium lamp LED 5000-8000 yuan, or even close to ten thousand yuan. “This money, whether government or enterprises to pay the costs are too high. Developed areas able to absorb the cost of okay, led yard lighting but in less developed regions, first from the street lamps began to apply, but affect their future marketing.”

Hospital professional LED super high power led marketing strategy

Hospital professional LED super high power led marketing strategyEmerging energy saving LED light source, back light, the display at full speed into the field of lighting applications, step by step into the street, commercial shops, hospitals and other lighting situations. With China out of incandescent road map officially released, the LED is expected to climb to the top of the mainstream light source throne. However, in China, the health system energy saving is still a new field, super high power led, but the LED hospital lighting with its bright prospects to attract the attention of many LED companies.

So, the requirements of the hospital system, whether the light environment what? Hospital professional LED lighting market prospects be? Grazing hospital professional LED lighting market cake? This article will be a professional perspective, super high power led, focuses on the hospital professional LED lighting market space and marketing strategies.

A Hospital professional LED lighting

A modern hospital to light environmental requirements: functional, clean and sophisticated

Hospital as a place of life-saving, the need to create a spacious and comfortable atmosphere, clean and quiet environment, super high power led, in order to give full play to the hospital, directly or indirectly impact on health. The modern hospital has grown from a mere social welfare into the general hospital of the business operations and modernization on behalf of management. The first impression of the patient into the hospital to determine the future of the hospital trust, which will directly affect the competitiveness of hospitals in the social market economy conditions. Hospital lighting is different from other places lighting, led high bay and more stringent requirements.

The construction of the hospital wards, clinics, medical technology and a variety of medical services and facilities, lighting requirements are also different. Good lighting effects to allow patients to relieve negative emotions, in a bright and comfortable environment so that patients can feel at ease to wait for treatment and treatment for the treatment of positive effects, super high power led, and to ensure the health workers to complete the work quickly and efficiently. alleviate the health care workers mental and physical fatigue, improve work efficiency. Good lighting design to consider the patient’s response to the lighting environment to avoid patient discomfort and resentment caused due to the lighting layout or poor choices, as far as possible to create a harmonious and comfortable medical treatment and recuperation areas. Conversely, if the lighting system is poor choice, super high power led, it is easy to become a place of bacteria, dust accumulation, will result in electromagnetic interference, direct impact on the hospital’s equipment life.

Hot invisibility cloak technology will seperate LED outdoor led spotlights?

Hot invisibility cloak technology will seperate LED outdoor led spotlights?Physicist Organization March 26 in the latest issue of “Optics Letters” magazine, the French scientists confirmed that many of the principles of optical invisibility cloak technology able to develop the transfer object to focus on certain hot thermal stealth or a regional “hot invisibility cloak.” The scientists said that the latest technology is expect ed to better control the heat dissipation in electronic devices, outdoor led spotlights, is also expected for the aerospace and solar technology.

At present, the progress achieved in the field of invisibility cloaks are based on the transformation of the basic principles of optics, which relates to the use of metamaterials and use it to allow light to bend, outdoor led spotlights, around the propagation of light in a space rather than through the space. For this reason, the Aix-Marseille University and the French National Scientific Research Center (CRNS), a joint researcher Sebastian Guna You led the team decided to clarify whether the same method can be used for the thermal diffusion.

Guna You said: “We conducted this study the main objective is: to use the conversion of optical tools, outdoor led spotlights, the success has been achieved in the field of sound and light ‘invisible’ to control the proliferation of hot.”

Guna You explained the basic principles of the latest technology and optical cloak, but there is still a critical difference. To date, the cloak to the trajectory of the operating wave for the center, including light and sound waves, LED high bay, but the biggest difference of the thermal field of the wave field contains the physics of the phenomenon of thermal diffusion rather than wave propagation.

The Guna You said: “is not a heat wave, it just spread from high temperature to lowtemperature, outdoor led spotlights, therefore, in these two areas from a leading role in mathematics and physics is very different principle. For example, the wave energy long distance travel attenuation is small, but a very limited range of temperature diffusion.

In order to create a hot invisibility cloak, Guna You and colleagues will be converted to optical principles of physics applied to the thermal diffusion equation and found that “hotcloak of invisibility” technology can be achieved.

A large demand of Hospital professional smd high power led market

A large demand of Hospital professional smd high power led marketThis year, many LED companies are beginning to shift from street lights to indoor lighting, indoor lighting commercial lighting, office lighting, home lighting, each LED enterprises have their own clear market segments. However, at present, the Hospital LED lighting market has not been surging in dysfunction stage, has not yet formed a larger brand affect the ability of enterprises; in the country, smd high power led, a breakdown of enterprises engaged in the hospital professional LED lighting, which means that domestic and industry no one can dominate the hospital professional LED lighting market “big brother”.

Necessarily affect the ability of companies such as Philips, Mitsuo Aurora etc. in the hospital professional lighting market, a little, led high bay, but the products they are involved in traditional lighting, LED lamps do not. Coupled with the factors of cost, technology, smd high power led, and hospital resources in the peer competition, foreign-funded enterprises failed to hit the ground running hospitals in the Chinese lighting market, and other medium-sized enterprises with a certain capital to suffer from cost and development of technology, could not be established in the market from the sales channels and terminal brand image.
Modern hospital building is a science, technology, information carrier, is an important symbol of social development, smd high power led, technological progress, standard of living and improved quality of life. With the increased demand of life, the more urgent requirements to improve medical conditions, and the advancement of health care reform, hospitals will be faced with fierce competition in the market, improving patient treatment environment, improve internal hospital management techniques to consider, many of the new hospital buildings Hospital lighting are the requirements of the many aspects of hospital lighting tend to hotel lighting direction of the development trend.

According to statistics, smd high power led, about 300,000 medical and health institutions, social ownership of the hospital professional LED lighting, a huge hospital professional LED lighting retrofits and new hospital market is very broad. The same time, the holdings of existing markets and also urgent need to transform the hospital professional LED lighting marketing prospects are very broad. Coupled with the hospital must ensure that the 24 hours of normal lighting throughout the year no holiday, outpatient services, mobility, multifunction zoning, and management of complex, high energy consumption. Many hospital departments, illumination requirements vary for the various functional spaces, general lighting, smd high power led, partial lighting, special places, lighting, direction-oriented lighting.Hospital places have different lighting requirements, lighting requirements in the same place in different time periods is not the same, even in the same place at the same time period due to different use, lighting the way there will be different. Therefore, the exhibition before the hospital professional LED lighting market is generally optimistic.

the LED light enterprises are listed bringing about a baby-boom period

the LED light enterprises are listed bringing about a baby-boom periodAt present, the world’s Resource Starvation, energy crisis have become the bottleneck to restrict the economic development. But the LED light industry still go on thriving under such environment. All the other LED lighting companies are trying to enter a capital market, which result in the LED light company baby-boom raised up. At present, China the LED light industry is in a stage of rapid development. LED listed company performs well in various areas of application fields, which arousing the public to turn a new eyes to such industry. China LED high bay industry will achieve great-leap-forward development under the leadership of the listed enterprises in the next few years, and it will overturn the existing pattern of China’s lighting industry.

LED enterprises are listed on the pursuit of all-round development, and to increase the production line on the basis of expanding total production capacity

According to the analysis survey of LED Engineering Research Institute, with a sharp drop cost in the upstream of the epitaxial silicon, the upstream of the epitaxial silicon, midstream package, downstream applications have formed a 1:4:9 proportion of marketing size. Based on the calculation of 50% of the epitaxial silicon , 30% of the middle package, 20% of the downstream applications, LED upstream epitaxial silicon is only 14%, midstream package accounted for 34%, and downstream applications accounted for 52% on the profit distribution of the entire LED industry chain. The quality will change once the quantity increases. Right now, LED enterprises are listed in order to enhance their own production capability, increase total output, and to low down the cost through economics of scale.

To many the LED light companies, being listed is just a new beginning, not the ends but a means. In order to avoid many other industries and enterprises listed “Jian guang Si” situation, LED listed enterprises and all the stake owners should be aware of it. Meanwhile, under the tide of LED enterprises, LED listed companies have to face the structural excess of production capacity at this stage. LED listed companies, even with the help of money, should not only use widely of the energy and money, but also continue to nurture professionals in all fields, and to consolidate all aspects of enterprises through the talents.

Why led task lighting are not universal in China?

Why led task lighting are not universal in China?

A lot of people asked me, Why led task lighting are not universal in China? The reasons are very complicated.

1. Price. As we all know, the cost of LED products are very high,  it makes the price of LED Products are also much higher than the consumers could accept. Normally, Chinese only focus on the prices, never think of the energy saving. Now, if you use led products from good suppliers, like Eneltec (as we all know the top LED High Bay factory), you could use 7W led to replace 40W Incandescent bulbs, also, you could use 5W led to replace 26W CFL. The future market of led task lighting should not be only in big cities, but also the towns, villages. If we want millions of people buy the led products, firstly, you should make billions of people who know about the led products.

2. Environmental protection. The western countries buy a lot of LED products, why? Just because they are rich? NO. The most important reason is that, they have the concept of Environmental protection in their mind. If everybody in China really understand the importance of Environmental protection, the led products could be sold well in China.

3. Technology. Based on the technology now, led could output about 100lm/w. It’s still not high enough to replace all the traditional lightings.

If the led task lighting could output 200-250lu/w, the total cost of led products would be 50% off, at that time, the led would be universal in everywhere, even in China.

Worry about the Radiation of CFL? Use led vehicle lighting!

Worry about the Radiation of CFL Use led vehicle lighting

Nowadays, some newspaper says, the Radiation of CFL (Compact Fluorescent Lamp) is very high, also, it could be harmful to people’s health. Is that true?

Actually, the CFL means the Fluorescent with self-ballast inside. These designs started in the beginning of 70’s. The advantage of CFL is that, the power consumption is much lower compared with Incandescent lamps, and also longer lifespan.But as the competition is more and more tough between the CFL suppliers. A lot of CFL manufacturer produce CFL which could not pass the IEC testing.

Eneltec (as we all know the top led high bay producer) test 87 samples from different CFL suppliers, according to the standard of IEC 62493:2009,  and found, from all these sampels, Radiation is much lower than the Mobile phones, for example, Iphone 4s.

Based on these results, if we don’t want to CFL, we should also don’t use Iphone. It seems not so possible, even the Nokia N10 is much better than Iphone 4s.

The situation is also happened in vehicle lighting. The power consumption of HID lamps are very high, compared with led vehicle lighting.  I have a good friend who works for Volkswagen, who told me more than 30% percent of vehicle lighting are turning to use led vehicle lighting. Also, Eneltec tested the Radiation of HID Lamps and led vehicle lighting, and found, the led products could be 80% better in the performance of Radiation testing.

Now, if we want to be safe from the Radiation, let’s use LED Products, CFL is the past, LED is the future!

“12th five urban green lighting Plan” to the revelation of the led downlight replacement business

On November 4, 2011 by the National Housing and Planning at the Ministry of Construction released the “12th Five-City Green Lighting Plan” (hereinafter referred to as the Outline) a notice to clarify that the guiding ideology of the urban green lighting, basic principles, led down light replacement development goals and priorities, as well as safeguards, is the basis for the implementation of urban green lighting around the “12th five-Year” period. Then the planning framework to which new features of which the content is worth the LED lighting business concern will be how to bring the LED industry development opportunities and requirements, led down light replacement these are our concern from a macroeconomic policy-oriented aspects of the problem.

"12th five urban green lighting Plan" to the revelation of the led downlight replacement business

Ensure that lighting quality is a prerequisite

Outline clear that the urban green lighting in order to protect and improve people’s livelihood as the basic starting point, stressed under the premise of ensuring the quality of lighting in order to achieve the basic principles of energy conservation. For the LED light source, led high bay has been to promote energy-saving concept. LED lighting in the initial penetration stage, the product quality assurance is the core foundation of the enterprise survival and development, and for the formation of per- marketing and consumer word of mouth. In fact, led down light replacement companies are able to achieve long-term development of a strong product advantage.

Lighting quality control standards, outline the city road lighting, road surface luminance or illuminate, uniformity, glare limits, the environment is better than lighting power density(LAD) shall comply with the provisions of the “city road lighting design standards (CJJ45). LED company’s products should comply with the relevant standards, led down light replacement should also do in-depth consideration in terms of light distribution, color temperature, and environmental contrast depending on the road lighting environment.

Requirements of energy conservation is still an urgent

Specified in the outline of the “12th Five-Year” period to achieve energy efficiency goals,to 2010 as the base, “12” end of the city lighting energy-saving rate reached 15 percent.Recalling the “Eleventh Five-Year”, and its energy saving target of 25%, led down light replacement but the energy inspection in 2010 showed that only 14.6% of the energy-saving rate. “Eleventh Five-Year” energy saving target is not satisfactory, so the “12th Five-Year” period of energy-saving pressures are still strong.