作者：Blade

DC power supplied led dimming technology

 

DC power supplied led dimming technology

 

Adjust the forward current to adjust the brightness to change the brightness of the LED is very easy to achieve. The first thought is to change the drive current, because the brightness of the led dimming technology is almost directly proportional to its drive current.

 

1.1 to adjust the forward current

Current sense resistor to adjust the LED current to the most simple way is to change and LED load series, almost all DC-DC constant current chip has a detection current interface is detected by the voltage and chip internal reference voltage to control current constant. But the sense resistor value is usually very small, only a few tenths of Europe, if you want installed in the wall a few tenths of Europe’s potentiometer to adjust the current is unlikely to lead resistance there will be a few tenths of Europe. Some chips provide a control voltage interface, changing the input control voltage can change its output constant current value.

 

Forward current of 1.2 tone makes chromatography offset

However, to adjust the forward current to adjust the brightness will have a problem, that is, adjust brightness while also change the spectrum and color temperature. Because the white led high bay excitation with blue light LED yellow phosphor, yellow phosphor thickness without a proportionate thinning, when the forward current is reduced, the blue led high bay brightness increase, making it the dominant wavelength of the spectrum increased.

 

Of course, these problems in the general led dimming technology may not be a big problem. RGB LED system, however, will cause the color offset, the human eye color deviation is very sensitive, and therefore cannot be allowed.

The price of high output led bulb is quite close to energy-saving lamps

 

The price of high output led bulb is quite close to energy-saving lamps

 

LED chip Diving high output led bulb prices approaching the energy-saving lamps

“Two years ago, 1-watt LED chip price is about $ 3, but is now down to less than $ 1 cheaper, Taiwan and the mainland-produced chips, or even three yuan a. Foshan Lighting Association Wu Yulin told the author. May Xu Rui Optoelectronics put into operation the LED chip, the official told the author, “probably in nearly a year’s time, chip prices fell more than 6 to more than 2 yuan.

 

It is understood that the chips accounted for at least 1/3 of the cost of high output led bulb, chip price cuts directly drive the LED price decline. In recent years, chip prices fell about 20% of the annual rate, the price of led high bay from two years ago is generally 7-10 times the energy-saving lamp, dropped to 3-4 recent times. At present, the price of energy-saving lamps has been stable at $ 6-10, and LED lamps from 50-300 down to 30-100 yuan.

 

I visited yesterday the Chancheng of Wal-Mart and Weiguo Lu many lighting stores learned that generally 10% -30% increase in sales in the first half of the LED lights. “Nearly a year, the price of LED products generally decreased by 30%, mid-range price of high output led bulb is probably between 100-300 yuan, nearly two months of business to maintain 10% growth.” To operate in the Great Patriotic Road the glare of Green lighting Co., Ltd. business on behalf of the European Jingyang said.

History of the LED street lighting: as fast as a train

 

History of the LED street lighting: as fast as a train

 

The first stage, LED lamps, utility model stage.

On the basis of the previous stage, the market for LED street lighting products has been recognized and accepted. Other features of environmental protection, small size, high reliability of the LED lamps are increasingly prominent. Thus developed a series of products will be completely different from the traditional light source applications become very popular. The lighting industry will be a more open space for development. Light source is no longer only play a role in lighting, it’s changing bit by bit in making more appropriate for people working and living. The fight by the various manufacturers is to design application advantage.

 

The second stage, LED street lighting, smart control stage.

With the development of things such as new technology, the LED as the semiconductor industry, will also catch this tour high-speed train to play out its high controllability. From home to office buildings, from the road into the tunnel from the car to walk from the auxiliary lighting to the main lighting with LED street lighting intelligent control systems will give mankind a higher level of service. Led high bay lighting industry will also be doing product design product, to providing total solutions to the course.

 

The third stage, the LED lamps to replace the acceptance phase.

This phase is mainly luminous efficiency (energy consumption), and long life LED lamps in the early stages of development. The customer has an acceptable process, the first transition and on the habits and appearance. The consistent use of traditional light sources, LED street lighting reflects the energy saving, longevity and other features make the market easier to accept the relatively high prices.

LED house lights made by shells


LED house lights made by shells

 

For former soldiers sharper Jake Wright, just past the 2011 must be a good year, I guess, because in this year, the planet is basically from the first hit of the year-end, continuous rumble, to stay under the earth, blood, body parts – well, In fact, Jake is not a bloodthirsty war-mongers, these strong interest only relationship to his way of getting money. Because he likes to make LED house lights collected from the discarded shells.

 

For a military enthusiast, Jake these productions are undoubtedly sacred objects – a lot of people can be like General Chang talking about, but not put this world in their own living room, one bomb. For opponents of the war, and a variety of public knowledge, these things are valuable, these shells from almost all well-known battlefield in recent decades, such as the powerful cruise missiles from the Korean War, such as cluster bombs from the Vietnam War , and even World War II used against the German submarine missile. A little bit of smoke flavor, and a large pile of sense of history, this is Jake want to leave you.

 

In addition, the buy back lighting, first do not just install, should carefully look at the mark of the lamps and read the installation manual, in accordance with the instructions for the installation of lighting, lamps, according to the instructions in the rules governing the use and the timely replacement of aging led high bay light source parameters by LED house lights, found across the lamp red lamp jump does not shine, it should be replaced, and to prevent the occurrence of ballast burned out and other insecurity. Cleaning and maintenance should be careful not to change the structure of the lamp, it should not replace the lamp parts, after the end of the cleaning and maintenance should be intact fixtures will be installed, not to leave the wrong installed lamps parts.

Comparison between LED housing lights and traditional lights

 

Comparison between LED housing lights and traditional lights

 

1, the brightness

LED housing lights have a relatively brighter than traditional lights, thus they have different prices.

 

2, the antistatic ability

Antistatic ability LEDs, long life, and therefore higher prices. Usually static than 700V LED can be used for LED housing lights.

 

3, the wavelength

The same wavelength LED,? Same color, such as requiring the same? Color, the price is high. No the LED housing lights instrument manufacturer it is difficult to produce pure colors products.

 

4, the leakage current

LED is one-way conductive light, if the reverse current is called leakage, the leakage current of the LED, short life, low prices.

 

5, light-emitting angle

Different uses LED housing lights angle is not the same. Special light-emitting point of view, higher prices. If all diffusion angle, the higher prices.

 

6, the life

Different key to the quality of life, life light bad decision. Light decay, long life, long life and high price.

 

7, the LED chip

LED housing lights chip, different chips, the price difference. Chips more expensive in Japan, the United States, the Taiwan plant and the local Chinese manufacturers LED chip price is lower than the United States.

 

8, the chip size

The size of the chip to the side of the quality of large-chip LED housing lights (sometimes led high bay lights can be used for instead) is better than small chips. Prices are proportional to the chip size.

 

9, the colloid

Ordinary LED housing lights colloid general epoxy resin, plus a more expensive LED UV and fire retardant, high-quality outdoor LED lighting should be UV and fire.

 

 

The luminous intensity analysis for LED road lights

 

The luminous intensity analysis for LED road lights

 

First LED street lighting (hereinafter referred to as “LED lights”) is a hot topic of the Lighting Industry, especially the past three years the number of LED road lights products increased a lot, test data is changing, these data is to evaluate LED street lamp Photometricthe basis of performance and quality. U.S. Department of Energy (DOE) published in SSL luminaires meet ENERGY STAR qualified criteria in the evaluation of LED road lights – Photometric properties provides us with a reference. Technical papers of Chinese lighting network LED lighting.

 

Correlated color temperature, color space, uniformity, color rendering index given co criterion, the U.S. Department of Energy Energy Star Class A light in August 2008 (the recent call by class B light for the long-term goal), supplementary requirements for minimum light output for outdoor installation of road lighting, ring lumen density, and the the IESNA lamp light distribution classification of the beam uniformity, and lighting energy efficiency benchmarking.

 

Supplementary requirements to DOE for a Class A LED road lights based on test results based on measurements from 2007 to 2009 to get the 100 led high bay lights, on the status and level of China’s LED lights photometric data for analysis, to enhance and improve China’s LED the streetlights quality information.

 

This analysis involves the photometric performance of the LED lights, including the light output of lamps along the road’s vertical light distribution along the lateral light distribution of the road, C-90 ° C-270 ° with optical symmetry and beam uniformity and the level of light interception, and also analyzed the energy efficiency of the lamps. This analysis does not involve the color performance and light output of LED road lights to maintain the rate.

Zero tariff for high power led street light exported to Costa Rica

 

Zero tariff for high power led street light exported to Costa Rica

 

Recently, Foshan, Inspection and Quarantine issued Chancheng Qumou Trade Co., Ltd. China – Costa Rica Free Trade Agreement of origin certificate “. High power led street light exported to Costa Rica to enjoy tariff preferences lamps stand down to zero tariffs by up to 6%.

 

Foshan enterprises preferential certificate of origin export Costa Rica, with Foshan, Inspection and Quarantine issued preferential certificate of origin, batch worth nearly $ 20,000 of goods arrived in Costa Rica Costa Rica can enjoy the tariff concessions. Foshan, Inspection and Quarantine said, have been shipped, but after 1 August 2011, the goods arrived in Costa Rica can apply for a replacement – Costa Rica-China Free Trade Agreement preferential origin certificate of “the same can enjoy tax reduction relief.

 

China is Costa Rica’s second largest trading partner. “China – Costa Rica Free Trade Agreement signed with China, Costa Rica, and on August 1, 2011. According to reports, with the formal implementation of the Costa Rica Free Trade Agreement, and Costa Rica will be more than 90% of the high power led street light products phased implementation of zero tariff, Foshan traditional export products such as cotton tariffs on textile raw materials reduced to zero from 10% stand, led high bay lights stand down to zero tariffs by up to 6%, most of the zero tariff in the small household appliances, building ceramics, toys, high power led spotlights and other tariffs by 15% year by year down to zero, and so on. Costa Rica FTA implementation, created favorable conditions for Foshan to explore the Costa Rica market.

Which type is the most popular in led indoor lights?

 

Which type is the most popular in led indoor lights?

 

Indoor lighting types which popular? Raymond lighting manufacturers with the construction of three major platforms. Raymond lighting home a few years ago, has been concerned about the field of electronic commerce, and has been using more advanced led indoor lights technology, e-commerce as a platform for the display of the products and brands, today, Raymond lighting by integrating internal and external resources, and finally completed Raymond lighting the three major e-commerce platform construction: Raymond official website, Raymond Taobao store, Raymond Habitat worry led indoor lights store, three platforms have different emphases, which, lighting Raymond official website will be the Raymond lighting brands the most comprehensive publishing platform with products, combined with product sales and customer communication and effective sharing of resources. Year of the Dragon investment money the project was Raymond lighting to join.

 

Indoor lighting types which popular? Raymond lighting manufacturers with the construction of three major platforms. Raymond Lighting brands of lighting, electrical field of the two associated as a core industry, after nearly 10 years of development, with precise strategic led high bay, excellent execution efficiency, rapidly changing world in the new platform. Raymond lighting as a set of R & D, manufacturing, sales as one of the four categories of products in commercial lighting, electrical switches, light electrical appliances, home lighting, and other innovative emerging enterprises, the enterprise since its inception attached great importance to personnel training and advanced management mode the introduction in 2005 through the ISO9001 international quality system certification, and the management of the slogan of “Total Quality Management” in the same year, from corporate strategy to develop raw materials procurement.

How to choose household led light bulbs for your kitchen

 

How to choose household led light bulbs for your kitchen

 

The kitchen light is not too fancy

 

In general, an open kitchen cabinet, whether it is a shaped, L-shaped or U-shaped cabinet, light source, the use of embedded ceiling household led light bulbs the form of the number of 6-10 dollars. Generally do not use the ceiling, because it does not concentrating only astigmatism, so should not be installed in the kitchen. Light as we choose the warm light, this light is very beautiful.

 

Cloth lights according to how much share of the overall space of the open kitchen arrangement, kitchen area of 10 square meters, to ensure bright, use a 9 light, surrounded by eight, the middle of a method of installation. Each spotlight wattage does not have to be too high, but also to prepare the switch can be adjusted. If the kitchen area of 6-7 square meters, kitchen with 6  household led light bulbs enough, more beautiful layout to two horizontal and three vertical arrangement of France.

 

Room-storey high, you can also use the chandelier in the middle of the open kitchen, surrounded by led high bay. The shape of the lamp must not be too complicated, so as not to cause trouble in future cleaning.

 

Strong contemporary cabinets with spotlights metallic look, antique-style kitchen ceiling lights should be of similar color; no matter what style of kitchen, household led light bulbs should choose simple shapes, glass, stone, iron and other materials with ceramic tile are good .

 

All in all, the kitchen is a place for cooking, try not to make it dress up too fancy, it is best to choose the cabinet comes with its own light. From the energy considerations, do not place too much light, to install the smart switch.

Maintenance knowledge for household led lights

 

Maintenance knowledge for household led lights

 

First, read the instructions

Buy back lighting, first do not just install, mark and read the installation manual should carefully look at the household led lights, and then instructions for the installation, the use of led high bay lighting, or they may be dangerous.

 

Second, the problems with the timely replacement of

The timely replacement of the aging of the lamp light source parameters provided by the flag and found that the tube ends red, household led lights black, or a shadow, the lamp jump does not shine, you should replace the lamp in a timely manner to prevent the emergence of the ballast burned and other unsafe phenomenon.

 

Third, do not change the structure of the lamp

Cleaning and maintenance should be careful not to change the structure of the household led lights, the lamp should not replace parts after the cleaning and maintenance should be intact fixtures will be installed, not to leave the wrong installed lamps parts.

 

Fourth, do not frequently switch

Try not to frequent the use of household led lights, switches, because of the current when the lamps in the frequent start the instant the current through the filament is greater than the normal work, making the filament temperature increased sharply accelerate the sublimation, which will greatly reduce its service life, and therefore to minimize the lamp switch.

 

Fifth, the correct maintenance

Lamps in use, but also to strengthen the maintenance, in order to extend their useful life. Room lamp should always use a dry cloth, and pay attention to prevent moisture intrusion, so as to avoid a long time the phenomenon of corrosion damage or leakage short-circuit; installed in the toilet, the bathroom lights shall be fitted with a moisture-proof shade, otherwise it will greatly shorten the life;