Do you know the big mistakes when buying lamps?
Recently, many people have found that they are buying the wrong lights, and the lamps they buy are often not suitable. Xiaobian also heard friends mention why LED lamps are so bad? And like this, it seems that many people have encountered it. Perhaps by understanding the misunderstandings of the next article, you can avoid some unnecessary troubles.
1. When replacing traditional lamps with LED lamps
Purchased lamps with different light distribution
This may be the most common problem in the process of replacing traditional luminaires with LED luminaires. Compared to fluorescent lamps, LED lamps have a more directional light distribution. Fluorescent lamps emit light at various angles around them, but LEDs have different light distributions, and LEDs are more concentrated than conventional lamps.
For example, if you replace a halogen spotlight with an LED spotlight, you will get less spilled light. Halogen lamps have a fixed beam angle, but there is still a small amount of light on either side of the beam angle, which is beneficial in some cases. When it is necessary to illuminate a painting indoors, it is generally not necessary to have a very clear light shape. We hope that the light in the middle is the brightest, and then slowly decays around, thereby highlighting the painting. Or when illuminating the walls on both sides of the hotel corridor, if you replace the fluorescent light with an LED light, then one third of the top of the wall will be filled with shadows. If you install a fluorescent light, we can see that the wall is relatively evenly illuminated. Because the light distribution of the two is different, it will appear dark when the top of the wall may not be distributed to the light. At this time, many people will feel that the lighting effect is very poor.
Solution:
Try a sample first for trial use, but this can be a bit difficult, because for most self-employed people, the necessity of using the test article is relatively low.
2. I bought a lamp that was too "cold"
Regarding the color temperature problem, the color temperature of the incandescent lamp is 2700K, and the color temperature of the halogen lamp is 3000K. If you replace them with 5000K color temperature LED lights, the entire space will look very cold. LED panels produced in Asia are colder due to cultural preferences in the region. This kind of regional cultural preference is actually not a good thing for lighting effects, but there are still many people who will do so.
High color temperature LEDs are easier to achieve high light efficiency, even today. The US environmental department has predicted this phenomenon, and they expect that by 2020, the luminous efficacy of warm white and cool white light can be achieved. However, due to regional culture, people still choose LED lights that are cold. This is actually not a good choice, especially for people who used incandescent or halogen lamps before. You need to look for LEDs of the same color temperature and choose some less efficient LEDs.
Solution:
Check the spectrum and purchase another sample.
3. The purchased lamp looks very dim
This issue is directly related to the color rendering index. In general, ones need a fixture with a color rendering index of 80 or preferably 90. A special weakness of the LED light is R9. We know that Ra is based on 8 color evaluation indicators, with 8 color samples, and R9 (red light) is a problem. Therefore, measuring R9 is a good practice. If the value of R9 is not high, the light will look dim and blurry. The best solution is to ask the specific color rendering index of the fixture.
There has been such a saying that if someone wants to sell LED lights to you, when you ask the color rendering index, he can't provide it to you, then it is best to go elsewhere to buy LED lights. From the above knowledge, we can find that this conclusion is unreasonable.
Solution:
Inquire about the specific color rendering index of the product.
4. Purchased LED lights that are not compatible with the dimmer
This is the problem most of the time for incandescent lamps. LEDs cannot be dimmed smoothly with incandescent or halogen dimmers, and strobes may occur at low illumination levels. This is because sometimes the resistive load of an incandescent dimmer interferes with the LED-driven electronics, causing component failure. All LED products have encountered this problem, whether it is Philips, Osram or GE lamps. Some people have combined many different luminaires with different dimmers to try to find a viable combination, but unfortunately the experiment failed.
Some merchants have taken a more sophisticated approach to this problem. When you tell them that you have the above problems, they will not tell you how to solve them, but will install incandescent lamps on the ceiling. Because you can't see the incandescent lamp at the top, you think that there is an effective lighting solution, but in fact, the incandescent lamp on the ceiling is continuously ignited. This kind of deception is very bad.
Solution:
Test the LED dimmer or add a dummy load like an incandescent lamp.
5. People will not investigate suppliers
In the past few years, many new LED lighting suppliers have entered the market, but in fact, it is necessary to investigate them before purchasing the suppliers' products. For example, are they famous brands? Are they members of trade associations? A series of questions need to be understood to prove their strength. For another specific example, such as the Lighting Industry Association, how long has the Lighting Industry Association been in the UK? Have you tested their products in well-known testing institutions.
Solution:
Search the Internet for suppliers, or ask about suppliers who have used suppliers.
6. People don't get regular warranty service
Does the supplier provide a warranty? Will they provide a warranty near you? There is a saying of "denim" in the lighting market. There is a group of people who change their names every two years, and they will make a very friendly and friendly guarantee when they sell. But two years later, they disappeared, or the name disappeared.
Among them, we also need to pay attention to the length of the warranty service will be longer than the supplier's business years? If the supplier only operates for one year, but they provide a 10-year warranty, there will be some problems. So we need to carefully check some small details in the warranty agreement, such as sometimes limiting the ignition time, and sometimes activation of the warranty service requires online registration.
solution:
Choose a well-known manufacturing brand and read the warranty carefully.
7. Buy non-persistent lights
In general, the rated life of an LED is the time it takes for its light output to drop to 70% of the initial light output. We all know that the light emitted by the luminaire is always fading. If a lamp can be kept for 100,000 hours without decay, it is already a very good performance. In general, we believe that if the light output of the luminaire drops to 70%, the life of the lamp is over.
The rated life of the luminaire is generally checked by the test called L70, which is the time to reduce the light output of the luminaire to 70%. You may encounter an LED lamp with a rated life of 50,000 hours measured according to the L70, with various optical ratings in the manual. But sometimes, such a lamp encounters a premature failure, that is, after the lamp is installed, it fails. This may be because the luminaire is based on the L70 test.
So what advice? The best solution is to ask the supplier directly which tests are based on the L70. If they don't even know what the L70 is, maybe they are a bunch of unreliable suppliers.
Solution:
Ask the supplier about the L70 test of the luminaire
8. People have no defense against the future
Suppose a fixture has broken within 18 months, and you call the supplier to find a replacement. Maybe he will say that he no longer produces that kind of product, but he can provide you with the latest products. But be aware that the latest products may look completely different from the lights on your ceiling. And if there is even worse, maybe you haven't even contacted the company long since it doesn't exist anymore. This situation is also the missing thing of the supplier mentioned above.
Solution:
If the luminaires you use are important, it's best to buy one more.
9. People buy lights that have too much glare
Due to LED, the problem of glare is back. Especially in the office, usually all the light emitted by the LED panel is reflected on the diffuse surface of the luminaire, that is, the plane of the luminaire, rather than in a bowl or louver-shaped optical system. This will generate too much light, so the uniform glare index UGR should be less than 19. This result is very credible.
The best solution is to simulate UGR calculations on your computer, or ask the vendor if there is a proper UGR-based installation. But unfortunately, after research, it seems that UGR calculations do not give much prediction for many LED lights. Fortunately, many studies are studying UGR's new algorithms and are currently trying to improve it.
solution:
Simulate the luminosity index of the luminaire, or directly ask the supplier for an appropriate installation of the UGR for the luminaire.
This is a few mistakes people often make. Why are we able to see so many bad LED fixtures? The existence of the above problems is part of the reason. With LEDs as the light source, we can more easily produce lamps that are better than gas discharge lamps. Understanding the above misunderstandings of the luminaires allows us to make more powerful things with LEDs.
If you are searching for the led lighting supplier, you can find anc lighting . And the popular product is the wholesale k9 crystal .
1. When replacing traditional lamps with LED lamps
Purchased lamps with different light distribution
This may be the most common problem in the process of replacing traditional luminaires with LED luminaires. Compared to fluorescent lamps, LED lamps have a more directional light distribution. Fluorescent lamps emit light at various angles around them, but LEDs have different light distributions, and LEDs are more concentrated than conventional lamps.
For example, if you replace a halogen spotlight with an LED spotlight, you will get less spilled light. Halogen lamps have a fixed beam angle, but there is still a small amount of light on either side of the beam angle, which is beneficial in some cases. When it is necessary to illuminate a painting indoors, it is generally not necessary to have a very clear light shape. We hope that the light in the middle is the brightest, and then slowly decays around, thereby highlighting the painting. Or when illuminating the walls on both sides of the hotel corridor, if you replace the fluorescent light with an LED light, then one third of the top of the wall will be filled with shadows. If you install a fluorescent light, we can see that the wall is relatively evenly illuminated. Because the light distribution of the two is different, it will appear dark when the top of the wall may not be distributed to the light. At this time, many people will feel that the lighting effect is very poor.
Solution:
Try a sample first for trial use, but this can be a bit difficult, because for most self-employed people, the necessity of using the test article is relatively low.
2. I bought a lamp that was too "cold"
Regarding the color temperature problem, the color temperature of the incandescent lamp is 2700K, and the color temperature of the halogen lamp is 3000K. If you replace them with 5000K color temperature LED lights, the entire space will look very cold. LED panels produced in Asia are colder due to cultural preferences in the region. This kind of regional cultural preference is actually not a good thing for lighting effects, but there are still many people who will do so.
High color temperature LEDs are easier to achieve high light efficiency, even today. The US environmental department has predicted this phenomenon, and they expect that by 2020, the luminous efficacy of warm white and cool white light can be achieved. However, due to regional culture, people still choose LED lights that are cold. This is actually not a good choice, especially for people who used incandescent or halogen lamps before. You need to look for LEDs of the same color temperature and choose some less efficient LEDs.
Solution:
Check the spectrum and purchase another sample.
3. The purchased lamp looks very dim
This issue is directly related to the color rendering index. In general, ones need a fixture with a color rendering index of 80 or preferably 90. A special weakness of the LED light is R9. We know that Ra is based on 8 color evaluation indicators, with 8 color samples, and R9 (red light) is a problem. Therefore, measuring R9 is a good practice. If the value of R9 is not high, the light will look dim and blurry. The best solution is to ask the specific color rendering index of the fixture.
There has been such a saying that if someone wants to sell LED lights to you, when you ask the color rendering index, he can't provide it to you, then it is best to go elsewhere to buy LED lights. From the above knowledge, we can find that this conclusion is unreasonable.
Solution:
Inquire about the specific color rendering index of the product.
4. Purchased LED lights that are not compatible with the dimmer
This is the problem most of the time for incandescent lamps. LEDs cannot be dimmed smoothly with incandescent or halogen dimmers, and strobes may occur at low illumination levels. This is because sometimes the resistive load of an incandescent dimmer interferes with the LED-driven electronics, causing component failure. All LED products have encountered this problem, whether it is Philips, Osram or GE lamps. Some people have combined many different luminaires with different dimmers to try to find a viable combination, but unfortunately the experiment failed.
Some merchants have taken a more sophisticated approach to this problem. When you tell them that you have the above problems, they will not tell you how to solve them, but will install incandescent lamps on the ceiling. Because you can't see the incandescent lamp at the top, you think that there is an effective lighting solution, but in fact, the incandescent lamp on the ceiling is continuously ignited. This kind of deception is very bad.
Solution:
Test the LED dimmer or add a dummy load like an incandescent lamp.
5. People will not investigate suppliers
In the past few years, many new LED lighting suppliers have entered the market, but in fact, it is necessary to investigate them before purchasing the suppliers' products. For example, are they famous brands? Are they members of trade associations? A series of questions need to be understood to prove their strength. For another specific example, such as the Lighting Industry Association, how long has the Lighting Industry Association been in the UK? Have you tested their products in well-known testing institutions.
Solution:
Search the Internet for suppliers, or ask about suppliers who have used suppliers.
6. People don't get regular warranty service
Does the supplier provide a warranty? Will they provide a warranty near you? There is a saying of "denim" in the lighting market. There is a group of people who change their names every two years, and they will make a very friendly and friendly guarantee when they sell. But two years later, they disappeared, or the name disappeared.
Among them, we also need to pay attention to the length of the warranty service will be longer than the supplier's business years? If the supplier only operates for one year, but they provide a 10-year warranty, there will be some problems. So we need to carefully check some small details in the warranty agreement, such as sometimes limiting the ignition time, and sometimes activation of the warranty service requires online registration.
solution:
Choose a well-known manufacturing brand and read the warranty carefully.
7. Buy non-persistent lights
In general, the rated life of an LED is the time it takes for its light output to drop to 70% of the initial light output. We all know that the light emitted by the luminaire is always fading. If a lamp can be kept for 100,000 hours without decay, it is already a very good performance. In general, we believe that if the light output of the luminaire drops to 70%, the life of the lamp is over.
The rated life of the luminaire is generally checked by the test called L70, which is the time to reduce the light output of the luminaire to 70%. You may encounter an LED lamp with a rated life of 50,000 hours measured according to the L70, with various optical ratings in the manual. But sometimes, such a lamp encounters a premature failure, that is, after the lamp is installed, it fails. This may be because the luminaire is based on the L70 test.
So what advice? The best solution is to ask the supplier directly which tests are based on the L70. If they don't even know what the L70 is, maybe they are a bunch of unreliable suppliers.
Solution:
Ask the supplier about the L70 test of the luminaire
8. People have no defense against the future
Suppose a fixture has broken within 18 months, and you call the supplier to find a replacement. Maybe he will say that he no longer produces that kind of product, but he can provide you with the latest products. But be aware that the latest products may look completely different from the lights on your ceiling. And if there is even worse, maybe you haven't even contacted the company long since it doesn't exist anymore. This situation is also the missing thing of the supplier mentioned above.
Solution:
If the luminaires you use are important, it's best to buy one more.
9. People buy lights that have too much glare
Due to LED, the problem of glare is back. Especially in the office, usually all the light emitted by the LED panel is reflected on the diffuse surface of the luminaire, that is, the plane of the luminaire, rather than in a bowl or louver-shaped optical system. This will generate too much light, so the uniform glare index UGR should be less than 19. This result is very credible.
The best solution is to simulate UGR calculations on your computer, or ask the vendor if there is a proper UGR-based installation. But unfortunately, after research, it seems that UGR calculations do not give much prediction for many LED lights. Fortunately, many studies are studying UGR's new algorithms and are currently trying to improve it.
solution:
Simulate the luminosity index of the luminaire, or directly ask the supplier for an appropriate installation of the UGR for the luminaire.
This is a few mistakes people often make. Why are we able to see so many bad LED fixtures? The existence of the above problems is part of the reason. With LEDs as the light source, we can more easily produce lamps that are better than gas discharge lamps. Understanding the above misunderstandings of the luminaires allows us to make more powerful things with LEDs.
If you are searching for the led lighting supplier, you can find anc lighting . And the popular product is the wholesale k9 crystal .
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