作者：Blade

the best led grow light and High Power LED

After the invention of the LED Street light bulb more than 100 years, advances in lighting technology, lights are also facing a serious threat. In order to achieve the traditional lamp lighting to LED lighting transition (the best led grow light),  Ultra-high brightness LED refers to AlGaInp red, orange, yellow LEDs, GaN-based blue, green, violet and UV LED.

We know that the glow is an energy conversion phenomenon. When the system by external excitation, the lower state transition from stable to unstable energy state. When the system consists of an unstable energy state back to the stable low-energy states.

the best led grow light and High Power LED

The structure of the LED Products chips (the best led grow light) of the PN junction electrode and optical systems. When the electrode with a positive bias, electrons and holes were injected into the P and N area, when the non-equilibrium minority carrier and majority carrier recombination, the excess will be the form of a photon energy into light energy. The light emission process consists of three parts: the forward bias carrier injection, combined radiation and energy transfer. Light emitting diodes have many advantages: low operating voltage, low power consumption; stable performance, long life; impact resistance, vibration and strong; light weight, small size and low cost.

Current of the LED light source (the best led grow light) for display and short-range, low-rate optical fiber communication, such as the indicator of a variety of instrumentation, digital and other symbols of the text display. Due to reasons such as brightness and color, LEDs also can not be used for general-purpose lighting, which is the LED future a very important direction of development.

Whether we choose a way to produce white light, if you want to replace the light bulbs, LED lights must be able to offer more light, must have higher energy efficiency. White LED per watt of power consumption can produce dozens of lumens (lighting used to measure light intensity units), the efficiency of incandescent bulbs. White LED is about 10% of electrical energy into light, incandescent bulbs, the conversion efficiency of 7% -8%. However, the white LED is clearly much more expensive than incandescent bulbs.

the best led grow lights and Brake lights

We can find a square or rectangular red brake lights in the middle of the back of the new car higher position. High brake lights, the scientific name of this lamp above the general than the rear of the car on both sides of the brake lights for some distance. A CHMSL the role warning behind a moving vehicle, in order to avoid rear-end accident. Normally, there are no high brake lights of vehicles, especially in the chassis to lower the car and mini-cars in the brake after the brake lights location is low, usually not enough brightness, followed by driving the vehicle chassis trucks with higher buses and bus drivers sometimes difficult to see. Therefore, the hidden danger of rear-end accident. Also,  the best led grow lights are difficult to produce. the best led grow lights and Brake lights A large number of research findings prove that the CHMSL able to effectively prevent and reduce rear-end accidents. Therefore, high brake lights, has been widely applied in many developed countries. Accordance with the regulations in the United States, for example, from 1986 all new cars sold must be equipped with CHMSL; from 1994, all sales of light trucks must also be installed CHMSL. By the end of 2006, there are at least 60% of the cars are equipped with LED type CHMSL. The benefits of LED Brake Lights are including faster lighting speed, higher efficiency, longer working life, and, very thin flat red LED array also has the simplicity of the design / installation. LEDs (the best led grow lights) can achieve full illumination in less than 1ms (rather traditional bulbs take up to 200ms to produce its maximum brightness), so that the rear of the driver of a vehicle identification time of the brake lights will be greatly reduced, thus reduces the probability of rear-end collisions. In order to achieve the performance and maximize the working life of the LED brake lights, we should use the brake system and also need a way to drive these red LED string, the appropriate LED (the best led grow lights) drive, which is essential. Compared to incandescent bulbs, power consumption also fell as much as 80%, resulting in the effect of saving fuel consumption. Its effective period of use will easily exceed the life of the vehicle, thus eliminating the need for replacement. In addition to the the CHMSL outside, some vehicles and motorcycles are still the main brake lights using LED Lights instead of incandescent brake lights.

The acceleration of industrial integration, LED projection lamp will illuminate family

Matsushita Electric machine(Beijing) Co., Ltd, chairman of Kimbra accept reporter to interview and, said the comprehensive development of China’s LED lighting is much more developing space, So Panasonic LED ratio in the business have a greater growth, especially rapid development of roads, public facilities and other fields.

Not only is the Panasonic, but also Philips upgrade China business to its global strategic layout. led projection lamp in Philips settle down in Chengdu last year, aiming at to invest 250 million euros in China within five year plan in order to improve the value chain of LED Street Light. Philips Lighting Division of Liang Hanfeng of president of big China division says,” our goal is to achieve 50% business volume in 2-15 years.

Right now Hengen in the lighting enterprise promote bottleneck. Tsinghua Tongfang group vice president Wang Lianghai that the addition of LED photoelectric conversion efficiency to be improved, the price is still popular in LED biggest bottleneck. The reporter also learned that, since last year, upstream of the LED chip prices and related materials cost is in drop, but still high higher than the ordinary energy-saving lamps products.  According to Wang Lianghai,  the price between current market LED lamp and the normal energy saving lamps is different in more than 5 times.

At present, led projection lamp applications more concentrated in commercial and civil fields. But the reporter learned from the exhibition, manufacturers generally think that civilian area will be the future focus on the development of domestic LED industry.

The industry hope that it is the State Council recently study determined to promote energy-saving products such as home appliances consumptions policies and measures, deciding to arrange 2.2 billion yuan to support energy saving lamp and LED lighting promotion. China’s semiconductor lighting / LED industry alliance secretary Guan Baiyu said, subsidy rules execute at the end of this month. The primary beneficiary will be the competitive large enterprise LED. Wang Lianghai expected, 2.2 billion subsidies will make LED lighting products price fall 15%-20%.

Tang Chao said, except the 2.2 billion subsidy, Guangdong Province plans in 3 years the province’s public domain mandatory replacement of led projection lamp policies on the industry as a whole to drive, but also pointed out that the subsidy policy have certain limitations. Only a portion of corporate profits, the future will aggravate the competition of the industry. Wang Lianghai expresses, at present among one thousand LED enterprises, famous brand is no more than 10, but occupy more than 90% market share. The reporter also learned that, from the beginning of last year, some small and medium-sized LED enterprises go bankrupt. The industry reshuffle began.

“500 million cake” boom the LED lamp market

A serious of countries support policies drive the LED Lighting Products hot. This week, on tuesday, the largest lighting exhibition in Guangzhou ended. This time, it attracted more than 2600 exhibitors, covering multiple areas of professional lighting, commercial lighting, LED raw materials, including Philips, Panasonic and other domestic and foreign well-known manufacturers. Report learned from the four-day exhibition that the manufacturers have confidence in the development of the industry, and think that the integration of the domestic led lamp market is accelerating. The future will have a number of small and medium-sized enterprises are facing elimination.


High temperature, rain and other adverse weather conditions did not affect the popularity of this year’s Guangzhou International Lighting Fair, reporter for two consecutive days at the scene to see the the crowded scene. The data show that from the show organizers, a total of more than 2,600 exhibiting companies, covering 21 exhibition halls, a total area of ​​220,000 square meters, more than 100,000 viewers approach.

Such a hot scene from the domestic led lamp market contains prospects for the future and enormous business opportunities. According to China Semiconductor Lighting Technology Development “12” special planning”. the LED lighting industry in China will reach 500 billion yuan in 2015, accounting for 30% leading enterprises, focusing on cultivation 20-30 leading enterprises, completion of the 20 national industrial base and 50 demonstrate city, and promote China’s semiconductor lighting industry into the world’s top three. Domestic and foreign firms want to receive a bigger one from the 500 billion big cakes.

The data show that the overall size of the domestic LED lighting applications in 2011 spent 121 billion yuan, with an overall growth rate of 34.44%. It is the fastest growing part of the LED Street Light industry. The general lighting growth is the most obvious, and the overall share has reached 25%. This growth will further enhance. According to the incandescent road map released in China last year, from October 1 this year will ban the sale and import of more than 100 watts and general lighting with incandescent lamps, to October 1, 2016 prohibit the sale and import of 15 watts and above general lighting incandescent lamp, incandescent lamp will gradually withdraw from this year, the stage of history,  to replace the existing incandescent market size with over one hundred billion yuan. Tang chao, director of marketing, believe that LED lighting will usher in new opportunities for development. He expects led lamp market will replace the traditional lighting wihin three to five years.

The penetration of LED lamp market is not easy to get through

As incandescent delisting date gets closer, in addition on the grant of the Chinese Government on the promotion of LED lighting. LED green lighting industry is in trouble, no doubt is a stimulant. Many LED lighting company will also be directed at the 2012 International Lighting Fair opened in Guangzhou, and hope to gain something.

In recent years, LED lighting entering into the voice of the civilian market has been high, but we can not find the effective policy. With the economic downturn in Europe and America, sales of led lamp market products in overseas markets continuing to fall.  Right now, The government is vigorously promoting LED lighting and LED Street Light. The industry believes that the twists and turns with the delisting of the incandescent lamp. Although, LED lighting penetration rate in the mainland is very small. One reason that do not prevail is the high price, but with the mature price of LED technology, it will be decline.

The bright future of led lamp market is subtle to the eye. But how to grab the market and reputation? Enterprises can be developed LED lighting which is more suitable for the most of people. Different from the past when creating a relatively high degree of previous product, at present, the most product-to-life products is the popularity of products.

For example, we can control light range such as the type of bulb lamp. The range of light can adjust the illumination range and angle according to their needs. And they can control color temperature of LED panel lights and LED wisdom lamps. It can be said that in the future, the use of LED wisdom lamps will be more and more.  Whose product is more close to our life, who will be able to win the market. In order to achieve real LED civilians, it must make the cost dropped to the acceptable range of ordinary civilians, which requires the LED focus on the openning up market, and also do the homework in the product technology. In addtion, greater need for government support.

In general, to open the led lamp market should let LED lighting into the civilian market. Then you need to change the thinking, adjust the ways and means. But now, we should explore step by step.

Many of the led lighting company said orders fell three to five percent are quite common in the industry

If the target of chip localization can be come true, LED lighting is expected to substantially lower prices, huge civilian market will accelerate to be open.

The economy in Europe and the United States have a depression, and export orders have fallen sharply, mainly in overseas markets led street light industry into a trough. However, continuing to adopt favorable policies of May give the troubled green LED lighting industry hit a shot in the arm. This level of excitement from the Guangzhou International Lighting International Lighting Exhibition as a barometer of the global lighting industry can get a glimpse.

Public information showed,  as the world’s largest lighting exhibition, the Guangzhou International Lighting Exhibition” organized by Guangya Messe Frankfurt Co Ltd, which has been a 17-year-old. Learned from the organizers, the exhibition area of the 17th exhibiton will be expanded by 10 percent, reaching a record high of 220,000 square meters.

However, experts said, LED green lighting industry is ongoing a reshuffle. The industry is still waiting for opening by mainland’s civil market.The premise of openning market is that the chip achieve localization. the led lighting company is expected to cut prices substantially.

As emerging industries, China’s LED lighting industry and  photovoltaic industry have a common Achilles’ heel –three outside: core raw materials overseas, and technology form overseas, the market concentration in the overseas, the market concentration in the overseas, China’s LED lighting industry is mainly concentrated in the lower reaches of the package end.

The data shows that 80% of the products in mainland the led lighting company are export-oriented. Under the influence of the European economic crisis, the weakness of the US economic recovery, since the second half of last year, the orders of the LED lighting business began declining. Prior to that, from the 111th Canton Fair, held on May, 20, we learned that, since the beginning of the order of the mainland China led projects companies from Europe and the United States, it is common to droy by 30%.

“This year, Europe and the United States market situation is particularly acute, a decrease of 40% of orders.” Caiya Hui, chairman of the led lighting company in Shenzhen City. Another enterprise in Donguan also said that ordrs from Europe decreased by more than 50%. The number of LED companies, said that Europe and the United States orders fell three to five percent are quite common in the industry.

The beautiful led lights effect can not afford the high cost of injury

Advances in technology, skills enhancement, car manufacturing has brought more changes. In recent years, the popular group of the led lights  give us a shine. With widely used “daytime running lights”, both beautiful “angel eyes” began to appear in the streets. When people enjoy these cool equipment that brings the visual pleasure at the same time, the problem behind also call for deep thought. Recently, the “Southern Metropolis Daily” damage replacement the led lights produced by the high cost and inconvenience, were reported. How to properly treat these problems become our focus today.

Mr. Dai of the professionals of the automotive lighting systems address this issue, put forward our point of view: auto parts manufacturing, including lighting systems, and design concept, the formation of the trend of more and more accessories difficult to replace of the entire assembly. Therefore, the supply of the spare parts on the market will be involved towards the whole plant maintenance solutions.

Compared with the old car used the traditional light bulbs, LED lamps have long life, better advantages of the lighting and more beautiful appearance. Automotive headlamps when using,  give a heat issue, leading to the surrounding temperature high, and difficult for cooling heating. The width light LED car made the normal operating temperature is below 60 ℃, when the temperature exceeds 60 ℃, the LED becomes less stable. Therefore, the biggest factor to affect the efficiency and lifetime of LED automotive lighting is the temperature. Therefore, If the headlamp of the surrounding temperature exceeds a certain temperature, the LED is very easy to burn, even sometimes the base of the LED lights will directly melt. For most of vehicles using LED lights, if the diode damage is more serious  and need to directly replace the assembly. Therefore, it is recommended to use good LED thermal conductivity. Moreover, in the use of the led lights , If not all lights do not shine, the number of fault lights affect the results of case, the entire assembly to be replaced, thus to keep maintenance costs to a minimum.

How to reduce the replacement cost of the owners? and also improve the existing LED High Bay technology is the problem facing in various car manufacturers. As customer, they should have a correct understanding and application of new technologies, not to use some improper way to safeguard their rights.

Introductions of LED testing methods (3)

Thermal property of LED refers to thermal resistance and PN junction temperature. Thermal resistance is the ratio of temperature difference in channel to its power consumption. Resistance and junction temperature are two important parameters which will impact an influence on LED High Bay photoelectric properties. There are two main methods for measuring LED junction temperature: using infrared microscope and micro-thermocouple to measure the surface temperature of LED chips. This value is approximately equal to LED junction temperature. Another method is to calculate temperatures of PN junctions according to the current-temperature relations. The later is more accurate than the former and has been widely used.

Thermal property of LED refers to thermal resistance and PN junction temperature.

Reliabilities of LED Lights include electrostatic sensitivity characteristic, service life and environment properties. Electrostatic sensitivity characteristic is the maximum electrostatic voltage that LED can endure. Some LEDs have higher resistivity and longer distance between positive electrode and negative electrodes. When electrostatic charge accumulated to a certain amount on both ends, PN junction will be breakdown. In more serious conditions, LED will be destroyed directly. Thus electrostatic sensitivity test for LEDs is necessary before installing them onto lighting boards.

 

Service life of LED Projects is calculated though another parameter: light attenuation, need long-term tests. In order to obtain an average value, scientists need to choose LED samples randomly. Through long-term observation and statistics to estimate the average working life of LEDs.

 

Environment characteristics of the LED need to be tested in simulated conditions. Like high/low temperature impact test, humidity cycling test, salt spray test, dust test, irradiation test, etc.

 

All LED testing methods mentioned above have strict international standards. As for electrical property tests, final reports should contain curve graph for forward bias voltage, backward bias voltage, forward bias current and backward bias current in accordance with related standards. Tests for luminous flux should using 2π structures. Light intensity should be measured in conditions provided by CIE-127. Spectrum tests, thermal property tests, service life tests all have their own standards.

 

LED has been developed more than ten years in China, there still lacking of scientific and effective standards. Standards for LED testing methods can eliminate differences that exist in LED testing in different regions. In other words, it can help realizing the unification of the commodity. The testing results can truly reflect the overall level of Chinese LED industry.

 

scientist of the led lights

Who invented LED? Nick Holonyak, Jr. is the right person? LED (led lights) is the name of the theoretical formal light-emitting diodes, a solid light-emitting device, the solid semiconductor chip as luminescent material, the epoxy package by the carrier in the semiconductor compound release excess energy caused by photon emission , there is no filament light easy to burn, heat deposition, the light fades and other shortcomings, the direct issue of red, yellow, blue, green, blue, orange, purple, white light.

scientist of the led lights

LED lighting products are the use of LEDs as a light source created by the lighting apparatus. LED is called the fourth generation of lighting source of light or green light, with energy saving, environmental protection, long life, small size, can be widely applied in various directions, display, decorative, and backlighting, general lighting and urban night scene of the field. In recent years, some of the world’s economically developed countries around the development of LED (led lights) launched a fierce technology race, and for example the United States since 2000 to invest $ 500,000,000 to implement the National Semiconductor Lighting Project, the EU also announced the launch of a similar rainbow in July 2000 plan, all hope to be able to sweep away the old era incandescent bulb.

As LED is small size, fast response, long life, LED lamps, anti-shock resistance, can improve the utilization of the limited car space, especially in energy-saving issue, LEDs are becoming the choice for headlamp light

The hot issues of the LED to become a world focus, then who first invented the LED? In 1962,  Nick Holonyak, Jr., he was just a large U.S. firm General Electric Company of an ordinary researchers, to create the first a red LED, and he also believes that can emit light of other wavelengths in the future, there are many different colors of light means that the LED (led lights) and incandescent lights must be LED to replace out. Nick Holonyak, Jr. Bell Telephone Laboratories in the University of Illinois (Urbana Champaign) to obtain a Ph.D. in electrical engineering (EE), and in 1954 earned a doctorate and enter one of the most important private research institutions, he only 26 years old, filled with outstanding talent. 1954, when he entered the United States Army began to enter after the 1957 GE, continued until 1963, also invented the first a red semiconductor laser device, which is of LD, known as laser diodes, is a key component of many later CD-ROM device, a printer or copier device. Nick Holonyak, Jr. invented the LED, in 1963 from GE, as his alma mater, that is, we mentioned earlier, the University of Illinois professor of Electrical Engineering, specialized personnel training at home, as well as the morality of the scientist. Many of its students were later set up his own business in Silicon Valley, California, USA, participated in the Silicon Valley technology wave driven.Nick Holonyak, Jr. invented the brake fluid (Thyristor), also known as thyristors have to let AC, DC the ability to convert each other, with some help for the future of electrical energy storage, the world’s three power through the thyristor conversion.

 

high power led price continued to fall 20%, half of domestic fear factory will close down

Overcapacity, high power led price are falling down, probably make half of production used in Sam sung Electronics (Sam sung) LCD TV, Sharp, computer display back-light light-emitting diode (LED High Bay) industry closed down. The only survival industry is the one who gets countries to foster. HSBC (HSBC) Jerry Tsai analyst pointed out that, the global television, computer sales weakness in fear so that LED Street Light prices continued to fall 20% in 2012. For smaller domestic LED industry, factory closings will be the only option. In contrast, the market capitalization of $2.8 billion LED giant safety photoelectric (San-an Optoelectronic Co.Ltd.), Guang dong Elect (EEC-Tech International Co.Ltd,) and other large-scale industry will continue to receive  government subsidies and continue to operate. Noumea Securities analyst Anne Lee said that this is domestic policy, they want the largest industry to survive.

According to the report, the recent capacity utilization rate in most of domestic LED is amounted to only 50%, the industry in 2010 and 2009 bought about 700 LED Lights manufacturing equipment, there is as many as half is in idle state. However, although the high power led price and market growth rate keep slow, yet about 2000000000 yuan of cash of large LED industry still intends to expand production capacity. UBS ( UBS ) report, Tokunho Junta has previously purchased 50 metal organic chemical vapor deposition system ( MOCVD/LED crystal growing equipment ), expecting this year that will purchase 100 sets .An op-toelectronic also plans to buy more MOCVD devices.

The report in the beginning of May, in accordance with the domestic incandescent lamps road map” requirement, this year 2012, in October 1st, 100W or more general lighting incandescent will be officially eliminated. By March 20th, the Ministry of finance, organized the 2012 semiconductor lighting products financial subsidies to promote the project. And it will be held in Beijing and invite public bidding. About 110 domestic enterprises are participated in the bidding. According to the reflect of many LED enterprises, this round of bidding is set a number of restrictions. Such of the requirements of energy-saving certification.

In fact, some news are spread in the industry of last year. The subsidy policy will have a change in style after, to provide ten enterprises subsidies, and to accelerate industry preferred and eliminating the inferior, and to breed competitive brand LED.