[In-depth evaluation] The quality of a cat mall ceiling light

As the e-commerce flames burned into the field of lighting, it also gave birth to a number of channels that are different from the traditional emerging lighting companies - Amoy brand enterprises, and they have done a good job, and even some traditional big-name lighting companies have begun to flock. Power e-commerce. However, the quality of Amoy brand products has aroused the curiosity and concern of engineers in the industry.

In this evaluation, the samples were purchased from the brand's Tmall flagship store. The sample selection ranged from the top ten sales brands (see the figure below). The four products are 9W white spotlights and 9CM holes.

Taobao spotlight sales list

The four products are 9W white spotlights and 9CM holes. Product information is shown below.

The following is the body of the report.

Sample description and description

EDLAN ADLGD-954A

Youfeng (model unknown)

A very happy YJXG-1

Fan Lang (model unknown)

Remarks: This evaluation is not responsible for the source and authenticity of the test sample, and is responsible for the accuracy of the test data. The test data is only valid for the sample to be tested.

First, security evaluation

According to GB 7000.202-2008 "lamps part 2-2: special requirements embedded lamps" and (GB 7000.1-2007 "lamps part 1: general requirements and tests").

Mark 3 (5.1)

EDLAN ADLGD-954A

The product is labeled as shown:

After the wiping test, the markings were not clear and did not pass.

Youfeng (model unknown): no nameplate, no pass.

A very happy YJXG-1

Unrated rated power, not passed.

Fan Lang (model unknown): no nameplate, no pass.

The product mark should indicate to the consumer the basic information of the product. In this sample purchase, there are no product identification on the two samples of Youfeng and Fanlang, and the other two Aidelang and Yijixiguang have incomplete product information marks. The problem. Unmarked or missing product information, in the course of using the product, there may be potential safety hazards.
In the production process of the product, the enterprise shall clearly and clearly indicate the basic information and parameters of the product in strict accordance with the existing national standards.

Power connection method 10 (5.2.1): All four samples passed the test.

External wiring cross-sectional area 10 (5.2.2): All four samples are less than 0.75mm2 and will not pass.

Internal wiring cross-sectional area 10 (5.3.1.1/5.3.1.2): All four samples passed the test.

Tensile test 10 (5.2.10.3)

EDLAN ADLGD-954A

There is no cord fixing bracket at one end of the light source cavity, and the soft wire fixing frame of the input and output end of the LED control device cannot effectively fix the flexible cable. After the tensile test, the cable is displaced more than 2 mm and does not pass.

Youfeng (model unknown)

The holder cannot effectively secure the cable. After the tensile test, the cable is displaced more than 2 mm and does not pass.

A very happy YJXG-1

There is no cord fixing bracket at one end of the light source cavity, and the soft wire fixing frame of the input and output end of the LED control device cannot effectively fix the flexible cable. After the tensile test, the cable is displaced more than 2 mm and does not pass.

Fan Lang (model unknown)

There is no cord fixing bracket at one end of the light source cavity, and the soft wire fixing frame of the input and output end of the LED control device cannot effectively fix the flexible cable. After the tensile test, the cable is displaced more than 2 mm and does not pass.

Anti-shock protection 11 (8): All four samples passed the test.

Electrical strength and insulation resistance 14 (9.3/10)

Adelaide ADLGD-954A: Passed.

Youfeng (model unknown): Apply 4U+2750V voltage breakdown between the live parts of Class II lamps and the metal parts of the lamps (no nameplate, U=220V according to the package label), not passed.

A pole of light YJXG-1: 4U + 2750V voltage breakdown between the live parts of the Class II lamps and the metal parts of the lamps (U=250V according to the nameplate mark), does not pass.

Fanlang (model unknown): Apply 4U+2750V voltage breakdown between the live parts of Class II lamps and the metal parts of the lamps (no nameplate, U=220V according to the box label), not passed.

Heat, fire and scratch resistance 15 (13): All four samples passed the test.

The safety performance of electrical products is the most basic guarantee for consumers to use this product. It involves the safety of users' personal and property, the circuit design of the products, and the line protection does not meet the standards. In the course of use, it may cause leakage and short circuit of the lamps and lanterns. Even the fire caused a safety hazard for the use of the luminaire.

Peng Xihe, vice president of research and development at Mingwei (Guangzhou) Electronics Co., Ltd. believes that there are far more test items than safety regulations, and the purpose of these tests is not to obtain certificates, but to ensure the safety of users. The cross-sectional area of ​​the AC end wire can ensure the possibility of reducing the fire under abnormal conditions; the AC end wire can withstand 25 times of pulling force, and there is no displacement between the outer casing, which can reduce the abnormality, the wire is pulled out and cause AC short circuit or use. The probability of electric shock; the electrical strength of the metal casing on the input and output or the input, and the insulation resistance between the input and output ensure that the user is not exposed to electric shock. These specifications are planned by many experts. The regulations of these regulations can also ensure the uniformity of the quality of the shipment, and the internationally renowned notary unit and the national quality unit endorsement of the product, can increase the customer's trust in the product.

Peng Xihe mentioned that in the United States, most customers believe in UL8750, in Europe they believe in ENEC and CE, and each other country has its own certification unit. In line with the certification of the region or the country, there is the ability to do business in the region or the country, providing enterprises with the opportunity to open the sales market.

Second, one of the performance evaluation

Tested and evaluated according to GB/T 29293-2012 " LED Downlight Performance Measurement Method".

Input power (W) 5.1

In the sample purchase process, I repeatedly confirmed with the customer service that the purchase power is 9W, because the product nameplate label information is not complete, etc., so 9W confirmed in the purchase process as the nominal power of the sample. From this point of view, the two samples of Youfeng and Yijixiguang, in fact, the measured power and nominal power deviation are 20% and 16.67%, respectively, and the product power has a virtual standard to raise its price/performance ratio.

Generally, the greater the power of the luminaire, the greater the luminous flux, and the higher the price of the luminaire. Ordinary consumers generally think this is more reasonable. Then, the high value of the power imaginary is actually equivalent to the high value of the luminous flux, that is, the price of the luminaire is raised. Under such misinformation, consumers will think that they have bought a value-for-money product, but they do not know that the product itself is not worth the higher "virtual price."

For ordinary consumers, we do not have such conditions. We use instruments to test whether a company's products have virtual standard components. It is recommended that consumers choose power when purchasing products, in addition to comparing product prices. The same product illuminates in the same environment. If the actual power difference between the two products is too large, it can be clearly felt by the naked eye.

Power factor 5.1

Power factor is a factor that measures the efficiency of electrical equipment. The power factor of the four samples failed to reach 0.5, indicating that the reactive power of the circuit for alternating magnetic field conversion has exceeded half, which reduces the utilization of the equipment and increases the line power loss.

Initial luminous flux (lm) 6.2

Light efficiency (lm/W) 6.4

Light efficiency is an important indicator to measure the energy-saving performance of a lighting product. The energy efficiency requirement of the US Energy Star for spotlights is 42lm/W (see the figure below), standing in terms of energy saving and environmental protection and saving lighting costs for consumers. Under the same power conditions, the higher the luminous efficacy of the luminaire, the greater the luminous flux, that is, the more total light energy emitted.

Energy Star requirements for downlighting fixtures

Light intensity distribution 6.6

EDLAN ADLGD-954A

Youfeng (model unknown)

A very happy YJXG-1

Fan Lang (model unknown)

Color rendering index 8.1

As an energy-efficient and efficient emerging lighting source, LED has penetrated into the family of millions of people with its practicality and environmental protection and energy saving advantages. For the average consumer, the quality of the lighting is mainly based on comfort. Color parameters are important parameters that affect lighting comfort. The color rendering index reflects the degree to which the light emitted by the luminaire restores the true color of the actual illuminated object. The greater the value of the color rendering index, the better the representation of the true color. The following table shows the functions exhibited by different color rendering values:

The four samples selected this time, the color rendering index has reached the demand of ordinary lighting places.

Correlated color temperature (K) 8.1

LED is used for general illumination, the color temperature should not exceed 6500K, and the color temperature is too high, which may cause disorder of the human body clock, causing insomnia. Of course, in some special commercial photos, such as jewelry lighting, there will be applications with high color temperatures.

Chromaticity space inconsistency (Δu'v') 8.2

Third, the performance evaluation of the second

This section does not have a national standard for LED downlights.

Chromatography tolerance (SDCM)

Evaluation method:

1. Measure the chromaticity coordinates (x, y) according to 8.1 of GB/T29293-2012 "LED Downlight Performance Measurement Method";

2. Refer to Appendix D of GB/T10682-2010 "Peripheral Performance Requirements for Double-Ended Fluorescent Lamps" to calculate the chromaticity tolerance of LED downlights.

The outermost layer of the beam is different from the center of the beam (Δu'v')

Evaluation method:

The test here is the change of the outermost chromatic aberration of the aperture. The calculated average coordinate of the outermost layer of the beam is the distance from the center coordinate of the beam, that is, the difference between the color of the outermost circle and the center of the beam, which is also the product color. Uniformity. The larger the value, the worse the uniformity of the product's light color.

The inconsistency of chromaticity space, the outermost layer of the beam and the color difference of the center of the beam reflect the spatial distribution uniformity of the product color, and the color difference between the outermost layer and the center is particularly concerned in the spotlight. Especially when applied to some places where the light quality is high, the color difference should be strictly controlled. The role of the spotlight is usually used to highlight the object being illuminated, and the uniformity of the chromaticity space is poor, but it is easy to cause the reverse effect.

Third, electromagnetic compatibility evaluation

Tested and evaluated in accordance with GB 17743-2007 "Limitations and Measurement Methods for Radio Disturbance Characteristics of Electrical Lighting and Similar Equipment".

Disturbance voltage (power terminal) 4.3.1

EDLAN ADLGD-954A

L end, not passed.

N end, not passed.

Youfeng (model unknown)

L end, not passed.

N end, not passed.

A very happy YJXG-1

L end, not passed.

N end, not passed.

Fan Lang (model unknown)

L end, not passed.

N end, not passed.

Radiated electromagnetic disturbance (30 MHz ~ 300MHz) 4.4.2

EDLAN ADLGD-954A

Horizontal antenna, does not pass.

Vertical antenna, not passed.

Youfeng (model unknown)

Horizontal antenna, passed.

Vertical antenna, does not pass.

A very happy YJXG-1

Horizontal antenna, does not pass.

Vertical antenna, does not pass.

Fan Lang (model unknown)

Horizontal antenna, passed.

Vertical antenna, does not pass.

The EMC test of the luminaire product is not enough, and it is easy to cause other electrical appliances located near the luminaire to work abnormally, and there is a big safety hazard.

Conclusion

Through the test of this sample, we found that although the current Amoy brand has a certain popularity, and the sales volume and sales are quite considerable, there are certain problems in product quality. While pursuing product sales, enterprises should not sacrifice the quality of their products to achieve an Amoy brand that is truly different from traditional corporate channels. Because from the current situation, Philips, Osram and other international giants, the general lighting products represented by 3-5W low power, the price has been at the same level as the price of domestic first- and second-line brand companies, and is close to the price. The bottom line, the living environment of Amoy brand, is also threatened by traditional enterprises, and it is not suitable simply by price. Through these tests, it can be seen that in some online shopping malls or jade. Some enterprises have the problem of trying to exploit the price war to open up the market.