月份：2012年5月

problems of using led grow lights

Currently, more and more lighting products use LED, such as LED lamps, LED Lawn Light, LED spotlights, LED underwater lights, the LED ground lights and so on. While everyone has a better understanding of energy-saving LED light source, long life, no radiation (green light), etc., but several key issues related to LED products (using led grow lights) also need to pay attention:

1, DC constant current power supply
LED products dedicated switching power supply (constant current source)-powered LED products will not affect the life of the product, but the product cost is relatively high.

2, to make anti-static measures
Different level of quality LED products, antistatic aspects are not the same, so the LED products to be used in the production process in the processing of certain anti-static measures: workbench ground, wear anti-static clothing, with anti-static ring with anti-static gloves, a conditional can be installed on anti-static ion fans, but also to ensure that the humidity around 65%, so that the air is too dry to produce static electricity, especially the green LED, it is relatively easier to be damaged by static electricity.
problems of using led grow lights
3, temperature cause the LED internal resistance smaller
When the outside ambient temperature, the LED light (using led grow lights) source resistance will reduce the choice of the constant current source to ensure that the LED current is independent of outside temperature.

4, Sealing of LED products
Used in the outdoor LED products are facing a waterproof, moisture-proof seal, if not handled properly it will directly affect the service life of LED products. Traditional epoxy “watering” way to seal the LED products, this approach is too much trouble, would cause an increase in the weight of the product.

The quality of the LED products currently on the market and the poor, good quality LED light source with high brightness, the light fades, the antistatic ability, long life, but cheaper than the price of a few times. Although some LED lighting project using low-quality low-cost LED light source will not find any problems, but will soon be “incomplete arrhythmia, manufacturers and users not on price” flame “. Selection of affordable, good quality LED light (using led grow lights) source, to ensure the life of the lighting project.

uv led grow light in led sorting

The initial LED is mainly used to sort the lights, and generally a single device, so the wavelength separation and brightness control does not require a high. LED normally in accordance with the dominant wavelength, luminous intensity, luminous flux, color temperature, operating voltage, reverse breakdown voltage of several key arguments for testing and sorting. LED Lights testing and sorting is a necessary process in the LED production (uv led grow light) process, but also an important part of the LED chip production and packaging costs.LED sorting in two ways: First, the chip-based separation, the second is the separation of packaged LED.
uv led grow light in led sorting
Chip test sorting in two ways: One way is to test the sorting done by the same machine, its advantages are reliable, but is very slow, low capacity; Another method is to test and sorting by the two machine to complete, test equipment records the location of each chip and argument, then passed to a sorting device for quick sorting, the advantages of doing so is fast, but the drawback is that the reliability is lower than the right, error-prone because usually there are two steps between the testing and sorting substrate thinning and chip separation process, in this process, epitaxial wafers may be fragmentation, partial incomplete fragmentation or partial incomplete, making the actual chip decentralized and does not match the information stored in the sorter, resulting in the separation difficult. The chip testing a fundamental solution to the bottleneck problem of sorting is to improve the uniformity of the wafer.LEDs can be packaged in accordance with the wavelength, luminous intensity, light-emitting angle and voltage of the test separator. The increasingly high demand for LED Street Light early sorter is 32Bin, later increased to 64Bin now the 72Bin commercial sorting machine. Even so, these LED technology (uv led grow light) indicators are still unable to meet production and market demand.The large display screen or other high-end applications users require a higher quality of the LED. In particular, is very strict requirements of the wavelength and brightness consistency. LED packaging factory for uv led grow light in the chip procurement stringent requirements, these packaging plants in a large number of package will find packaged LED only a small number of products to meet the requirements of a particular user, most of the rest will become the stock in the warehouse. This situation forced the stringent requirements in the procurement of the LED chip, LED high bay packaging factory is characterized by wavelength, brightness, and table-voltage indicator.

Multiple factors impede the road of led lighting energy efficiency

For the led lighting energy efficiency, why not join the retail business? Is the lacking of awareness of retail enterprises in Dongguan on the LED street light caused? Recently, the reporter visited, many factors have led to the retail energy saving road being stranded temporarily.

One Factor: the difficulty of pre-huge amounts of money invest into 

“Too much capital invested for the first time, more difficult to accept.” said an unnamed foreign retailers who use energy efficient T8 lamps two years ago. But this year continuously replace the lighting equipment, but not LED lights, and become T5 led lighting energy efficiency lamps.

The source said, LED lights are far better than the T5 tube light, but the upfront cost of investment let him give up the idea. Another local retail admits, it is not the understanding of the LED, but the indeed pre-occupied money. He claimed, take the normal LED for example, its price is 2-4 times than the energy saving lights. For the retail industry, it is undoubtedly a huge funds.

Two factor: low-quality products lead to a cris of confidence

Of course, in addition to the early pressure of the cost,  due to the current  low barriers of LED to entry, it lead to a large number of workshop-style cottage factory came into being. Inferior products flood the market, so this series of  disorderly competition weakened the trust of this market.

“For example, you go to an electronics market in Chang’an, in a few small store,you can buy the assembly parts, and even assembly instructions.” An LED industry insiders told reporters. Just spent a few dollars, you can buy all the parts to build a so-called led lighting energy efficiency.

According to a rough estimate of insiders, a few hundred people LED factory in Dongguan is about 100, while a dozen people to dozens of people, ranging from LED factory, there are nearly 1000. As LED industry is still no standard, low-quality product severe everywhere, using cheap to  impact the product of normal business of led lighting energy efficiency. At the same time, due to the low performance, it damage the overall reputation of the LED industry.

vehicle led bulbs and led display

The LED display is an important new type of flat panel displays, due to its high brightness, clear picture quality, colorful, make it display in a public multimedia field thriving, a lot of billboards, movie billboards will be designed for LED lights display, vehicle led bulbs, so a huge market space. When we judge a full-color display screen is good or bad, mainly to assess from the following aspects:
vehicle led bulbs and led display
1 Consistency
LED full-color screen, better consistency, the entire screen brightness should be balanced, no obvious color.

2. Dead pixels
Dead pixels is not greater than 0.03% in the indoor LED displays, outdoor LED street light screen, dead pixels should be less than 0.3%, and for the discrete-like.

3, Security
No security risks, leakage current and ground leakage current shall not exceed 3.5mA (AC RMS); anti-point intensity.

4 Appearance
The LED display frame no scratches. Outdoor LED display screen pixel pipe installation should be consistent, no loose shell and tube rupture phenomenon?

5 Structure
LED display part can be steel, aluminum, wood and other materials, the requirements of the rugged and beautiful.

6. Flatness
vehicle led bulbs, Display screen surface flatness to within ± 1mm ​​to ensure that the displayed image is not distorted, locally raised or recessed cause the display viewing angle of dead ends.

7. Brightness and viewing angle
Indoor full color display brightness to 800cd / m² or more, the outdoor full color display brightness 1500 cd / m² or more, in order to ensure the normal work of the display, otherwise it will be because the brightness is too low and can not see the show images.Directly determine the size of the viewing angle display screen audience, and therefore the bigger the better. The size of the viewing angle is mainly determined by the die package.

8 whether the mosaic, dead phenomenon
Mosaic is appears on the display lit or normally black box, that is, modules necrosis, mainly due to the connectors for the display quality, but off. Dead appears on the display lit or normally black single point of vehicle led bulbs, the point of death, how much to determine the die is good or bad.

9 with or without color in LED Products
Color is more obvious color difference between adjacent modules, the color of the transition module, cause the color phenomenon is caused by poor control system, the gray level is not high, low scanning frequency the.

video led light panel and led torch

The LED torch is a new lighting tool with  light-emitting diodes as light sources, it has low power consumption, durability, brightness, etc.. With the improvement of the white LED brightness, reduced costs, and gradually go such as the mass ranks. Currently, the U.S. and European markets have been large volume applications in high-power LED torch and video led light panel. For example, a dedicated to the field of high power LED flashlight: Challenger – Polar Light of Hight Power LED flashlight and LED High Bay using the original authentic high brightness 1W the LED (brightness up to 40 to 50 lumens) using constant current circuit design, the LED real done energy saving, low power consumption, long service life of 100,000 hours, a battery of six to eight hours, the shell is made of aluminum-magnesium alloy, anodized, corrosion resistant, super anti-vibration capability, coupled with waterproof structural design, able to adapt to the wild variety of harsh environments. The lamp condenser design, the irradiation distance of up to 50 ~ 100 meters, but also manual dimming, to achieve the best condenser effect of video led light panel.
video led light panel and led torch
Buy a good LED torch should note the following points (for reference):
1. Quantity of LEDs. It should be moderate. Home general rule, not more than 12, use the battery in 2 to 3 is better, and then a big wave a little for other special needs, according to the need to determine. Of course, high-power Hight Power LED flashlight and High Power LED Street Light is generally not the number of 12.
2, welding, welding to be in prison. Each diode is connected in the circuit board by soldering, if the Weld a bad contact, it may cause the bulb does not light or affect the overall use.
3, batteries, regular batteries and lithium two kinds of lithium rechargeable battery, but the low life, about two years, LED life of video led light panel about 10 years.
4, brightness, good high brightness LED flashlight, the decay rate is slow.
5, light bulb, the bulb goes out to the naked eye is difficult to distinguish between its good and bad, to see the consistency of the light bulb lit.
6, waterproof, good LED torch with waterproof function, seismic performance, and the ruggedness. It belongs to the electronics, flashlights front of a circuit board, once the water prone to short-circuit, resulting in damage.
7, aperture look good LED torch aperture for the uniform of a circle, poor LED flashlight beam is divided into yellow and blue two-color uneven distribution.
8, appearance, you can choose the aluminum alloy shell, beautiful LED TUBES.

The Retail LED lighting energy savings promotion road

Recently, the Commerce Department responsible person claimed that “the 12th Five-Year” period strive to build a large number of led lighting energy savings shopping malls, supermarkets and green hotels in the country. After the information spread out, the retail business of energy-efficiency road causing the concern again.

For labor,LED Street Light supermarket, power is the only way out of their savings. The reporter visited the site and found that energy saving has not only become the mantra of the retail business, but also to promote. Retail stores of LED lights in Dongguan city are not widespread.

Retail LED energy-saving promotion road

Retail LED energy-saving promotion road is difficult to this point, Kwong Chi-hung, fully understood.

Due to the broad prospects of the LED industry, three years ago, Nokia, Apple, Amazonand other companies OEM housing, Kwong Chi-hung, set up in DongguanJinyang energy technology company, specializing in the production of led lighting energy savings.

On the starting of set up, Kwong Chi-hung clearly recognize that small businesses can not get government projects, only the target in the commercial areas, the first is the retail business, the underground parking lot of the real estate business in these areas.

“Three blocks, stores, rents, wages, and lighting costs, lighting costs can be compressed. “Said Kwong Chi-hung.  The mall venue rental and labor costs have gone up every year and can not be lower down, but a cost of lighting by changing lighting facilities to compress the cost. Because the mall should be lights on, the overall cost of lighting is high, so this is where the stores must be cost-saving.

It is because of seeing that, Kwong Chi-hung start retail businesses to promote energy conservation.

The first companies to talk about cooperation Qing Town, local businesses, department stores Qing Town, Kwong Chi-hung, said that compared to traditional lights, LED lights put high cost in the fist time, therefore, in order to get each other’s trust, Kwong Chi-hung adopt free trial within half years to promote their minds, and then six months after, the stores all use LED projects energy saving lamps.

The effect of public praise get obvious, Fu Sheng boss Kwong Chi-hung, introduced the department stores in Shenzhen, Dongguan SPAR franchise owner. Kwong Chi-hung, soon reached an agreement of led lighting energy savings with these large-scale project.

voltage for led lights in led production

In the LED street light production, when we produce the chip package, the cup bubble occupies a large proportion, but the product in the production process if the bubble problem has not been a good solution or prevention, it will cause decay products a factor to accelerate the performance of IV to reduce the IR VF increased. So, any solutions for the existence of bubbles and plastic mixing full? Here we analyze from the few comments given by the people in the voltage for led lights industry.
voltage for led lights in led production
Factors affecting bubbles, but do some engineering assessments, can be solved led high bay step by step.  If there is a bubble cup, you can give a certain percentage of the plastic cup filling, and then proceeding to the next step process. The following relevant factors:
1. An environmental temperature and humidity had a greater influence on the bubble.
2. mold temperature is also generated a factor of the bubbles.
3. the formation of air bubbles and process adjustment.

For example, some factories there is no vacuum, no air bubbles, and even if the factories pumping vacuum bubbles, it should not be pumping vacuum. But the operating speed of skilled into a question of degree. And ambient temperature are also inseparable. Ambient temperature changes, we can take appropriate measures to control. If room temperature is 15 degrees, we must find ways to help glue the temperature reaches 60 degrees, so do the bubble cup should not occur again! Meanwhile, we should pay attention to many details in voltage for led lights. Such as tiny bubbles by eyes and subtle microscope can not see the drum pre-stick adhesive, but into the oven body, hot flatulence bubble expansion up.

Manually pre-Glue, brackets must be preheated. Preheat the pre-filling the AB material to swap the first two hours. As long as you keep the AB material, stents are hot bubble problem is not intractable. Encountered because of poor mobility, AB Cold, Cold bracket easily into the bubble. The operation should pay attention to the following question about voltage for led lights:
1. operating skills of the operator (the whole there are side air bubbles)
2. stick gum machine speed and the gel content is not well controlled (very prone to bubble place)
3. Machine is clean (this point will not cause air bubbles, but it is prone to the same thing similar to the ice, especially cyclohexanone)
4, To bracket the viscose, the drum speed is not fast.
5. change Glue, clean the rollers and led lights.
6. viscose machine.

 

 

warm led bulbs for different use

With the increasing application of high brightness LED acrylic channel letter and architectural lighting, and the red LED luminous acrylic advertising signs dominated by a great degree, the rest of the color of the LED brightness and power of improve, it is foreseeable in the future of the acrylic light-emitting logos and billboards, LED lighting like warm led bulbs will further occupy more market share and development.

1, An antistatic ability of the LED warm led bulbs
The selection of antistatic ability of the LED advantages: long life, but the price is higher.We usually refer to static than 700V LED can be used for LED lighting.

2, the same wavelength LED
In order of selection, pure color LED product, it is necessary to the manufacturer must LED Spectrophotometer instrument manufacturing the same wavelength LED, the same color, because they require the same color, so the price is high.

3, different brightness of the LED
The brightness of the LED, the price is also different. LED for LED lamps shall comply with the standard Laser Level I class.

4, the leakage current LED
Because the LED is one-way conductive light, so when the reverse current is called leakage. Leakage current of the LED, life is short, but the price is low.

5, the size of the LED chip
The size of the LED chip to the side that is also more expensive, the quality of large-chip LED is better than a small chip, the price of natural.

6, light emitting from a different angle of the LED
Different uses LED light angle. Like a special light-emitting angle diffusion angle, the higher prices.

7, the different prices of the chip emitters
LED light chip, different chips, the price difference. The chip is more expensive in Japan, the United States, the general chip prices lower than Japan, the United States.

8, the length of the LED life
LED life is determined by the light fades. When the light fades hour, long life, however, the price should be higher.

9, anti-UV and fire retardant colloidal
Ordinary LED colloid general epoxy resin, and added more expensive LED UV and fire retardant, high-quality outdoor LED lighting with UV and fire.
warm led bulbs for different use

In addition, we should consider each LED products like warm led bulbs will have a different design, in order to achieve the purpose for different uses, the reliability of LED lighting design must also consider the health and safety, electrical safety, for environmental safety, fire safety, safe use of time, machinery safety, and other factors.

warm led light bulbs for underwater use

High-power LED brightness is increased year by year, the price is becoming lower. Energy saving, long life, environmental protection and other advantages make led products breaking the existing lighting applications. Such as used in the underwater light-emitting logo,  glass curtain building, with the advantages of beautification and excellent lighting.
warm led light bulbs for underwater use
warm led light bulbs for Water features and fountains are essential parts of the leisure plaza and green parks, and thus the demand for underwater lights. Colored underwater lights are generally traditional PAR lamps, produce a variety of colors to the need for additional filters greatly reduce the luminous efficiency. LED high bay packaging technology to determine the directionality of the light source is very strong, coupled with the LED size is very small, able to cope with a variety of angles, optical lens, high luminous efficiency.

Acrylic light-emitting for warm led light bulbs identified as a neon alternative products, popular in recent years in many major cities in China, because the LED light source for not only overcome the traditional neon power consumption, maintenance inconvenience, there are security risks and lack of the shortcomings of the pen less draw, the The luminous body also has a full color, uniform light transmission, it is strongly three-dimensional, etc., these are difficult to compare with traditional neon and metal word.

The architecture of modern glass curtain class, lighting for the modern architecture of the large surface of glass processing, general construction of lighting the light-emitting device (light source) and the program of building components integration, so that not only the lighting of the connotation the deepening and expansion, and a variety of forms, refreshing. High Power LED street light with high luminous efficiency, small size, design flexibility and easy installation, new lighting solutions for such construction.

LED lighting industry like warm led light bulbs is a potential for development of future industries, packaging technology, cooling technology, optical technology, applied technology and control technology, continuous improvement, and constantly promote the accelerated development of the LED lighting industry. High-power LED in different areas will access to a wide range of applications, the coming era of the high-power LED.

warm white led light bulb about lumen

With conventional light sources,  we have several units about LED lights. To urge readers about warm white led light bulb to understand and easy to use, the following will be a brief introduction to the relevant knowledge: 1, the luminous flux Luminous flux is the amount of light emitted by the light source per unit time, the radiated power of the human eye can be felt by that part of the radiation energy. It is equal to the product relative to the viewing rate of certain wavelengths of radiation energy per unit time and the band. The human of warm white led light bulb on different wavelengths of light relative the viewing rate, so the radiated power is equal to the different wavelengths of light, the luminous flux is not equal. The symbol of the luminous flux Φ, the unit is the lumen (Lm). warm white led light bulb about lumen Spectral radiant flux Φ (λ), can be drawn from the luminous flux formula: Φ = Km ■ Φ (λ) is gV (λ) dλ Formula, V (λ) – relative spectral luminous efficiency; Km of-radiation spectrum of light depending on the performance of the maximum units of Lm / W By the CIPM in 1977 to determine the Km value 683Lm / W (λm = 555nm). 2, the light intensity Light intensity by the light energy per unit area per unit time, energy and frequency is proportional to their intensity (ie, integral), can also be understood as the luminous intensity of the light source in a given direction of the light source The luminous flux dΦ in the direction of transmission in three-dimensional diagonal elements divided by the provider of the solid angle element dΩ The unit of luminous intensity is candela (cd), 1cd = 1Lm/1sr. The intensity of space in all directions and is the luminous flux. 3, the brightness Test the brightness of the LED warm white led light bulb and evaluate the LED street light optical radiation safety of the process, commonly used imaging method to measure microscopic imaging can be used for chip testing. The brightness of a light source on the surface brightness, is the luminous intensity in a given direction divided by the surface element dS of the surface element perpendicular to the orthographic projection of the given parallel to the surface area of ​​the provider (warm white led high bay light bulb) The unit of brightness in candela per square meter (cd/m2 and). When the light-emitting surface and the measurement direction is vertical, then cos θ = 1. 4, illumination Illumination means the object is illuminated, the luminous flux per unit area accepted.Illumination and lighting, according to the surface and light source position in space, size and intensity of the light source and the angle of incidence of light Yu Xuancheng directly proportional to the light source to the illuminated surface is inversely proportional to the square of the distance. Surface illuminance E is the incident contains the luminous flux dΦ that point on the surface element divided by the quotient of the area of ​​the surface element dS.