Philips, Op, Hongyan Electric, Chau Ming Hanyuan, Guanhua Lighting six manufacturers LED ceiling lamp depth evaluation

The quality problem of the ceiling lamp also attracts our attention. As an important part of the decoration, the quality of the household ceiling lamp directly affects the comfort level of the overall light environment in the home interior. Choose a lamp with comfortable lighting, exquisite design and durability. important.


According to the feedback of many consumers and engineers, this evaluation starts with the household LED ceiling lamp, and tries to provide some reference for everyone in the future purchase through professional test data + industry big coffee reviews.

We randomly purchased 5 common brand ceiling lamps from the regular channels of the market and added them to the evaluation. The selected 5 lighting brands are Philips, Op Lighting, Hongyan Electric, Chau Ming Hanyuan, Guanhua Lighting, and invited third-party testing organizations to conduct samples. Detection.


The nominal power of the selected ceiling lamp samples is between 21-30W, which has been mass-produced and circulated in the market.


正 The body of the evaluation report ◁


When we receive the sample for purchase, we will first unpack the package to see the shape of the lamp.


Philips



This model is Philips Hyun Li series, the nominal power is 30W, the voltage is 100-240V, the power factor is 0.85, the sample size is 50*10cm, and the three-stage scene can be dimmed.


The design of the lampshade is made of metal engraved and simple cloud pattern, which is stable and round, and the details are more abundant.


Op lighting



This is the Op MX480 stone series, the nominal power is 22.5W, the current is 0.2A, the power factor is 0.5, the sample size is 46*9cm, and the two-stage dimming can be used. Irregular cracks in the shape, it looks soft and soft, more personalized.


Hongyan Electric



This model is a high-end LED ceiling lamp for the Hongyan jade series. The nominal power is 24W, the color temperature is 5700k, the power factor is 0.9, and the sample size is 48*9cm.


The overall design is simple, with a white jade pattern in the middle, and the temperament of “de-sludge without dyeing”.


Chau Minghan source



This ceiling lamp is the UHXD757 model of the Chau Ming Hanyuan Apple model, with a nominal power of 30W and a size of 53*53*11cm, which can be used for stepless dimming.


The overall design is square Chinese style, the texture is not bad.


Guanhua Lighting



Guanhua 蜻蜓 flying dance series ceiling lamp nominal power 30W, voltage 220V, size 50 * 12cm, two-color segmentation dimming. The appearance of the enamel pattern is very lively.


Overall, the five LED ceiling lamps are biased towards the bedroom living room scene, paying more attention to the design, style to meet the aesthetic needs of Chinese consumers, the material is quite stressful, the overall appearance is difficult to win.


However, it should be noted that some lamps are not completely marked with specific models, parameters, etc., which may cause some misleading to consumers.


Optical parameters


The basic parameters of photoelectricity reflect the most basic lighting quality and efficiency of the luminaire, and can be the most intuitive to judge the quality of the luminaire. The test is based on GB/T 9468-2008 "General requirements for luminaire distribution photometric measurement", GB/T 7922-2008 "Measurement method for illumination source color", GB/T 26178-2010 "Measurement method for luminous flux", IES LM -79-08 and other standards for testing.



Sample identification


The nameplates of Zhouming Hanyuan and Guanhua Lighting ceiling lamps are not marked with specific models. Although they do not affect the measured data values, the ceiling lamps are products of the 3C certification scope, so they do not comply with the 3C certification specifications on the brand name.


The product nameplate shall identify the basic information of the product to the consumer, and the information of the product that is not marked or missed may be buried in the process of using the product.


power



From the measured power, the Optel lighting sample is closest to the nominal value, and the difference between the Zhou Minghan source sample and the nominal value is the largest, with a deviation of 17.7%. According to the national standard, the measured power of the indoor luminaire and the nominal power value should be within ±10. Therefore, the sample of the Chau Minghan source does not meet the specifications.


For the average consumer, we can't have the same equipment conditions as the lab to test whether a product has a virtual standard component on this parameter. When purchasing, you can choose the same power product to illuminate in the same environment. If the actual power of the two products differs greatly, it can be directly felt by the naked eye.


Power factor



Power factor is an important factor to measure the efficiency of electrical equipment. The power factor is high and low, which greatly explains the driving power supply and circuit design used. We believe that the closer the power factor is to 1, the higher the efficiency of the circuit used by the luminaire.


The power factor of the Guanhua lighting sample ceiling lamp is less than 0.5, indicating that the reactive power of the circuit for alternating magnetic field conversion has exceeded half, and the circuit loss is large.


Light effect



Of course, consumers are more concerned with light efficiency than simple power consumption. The overall light efficiency of a luminaire is its most important performance indicator, including not only the luminous efficiency of the LED itself, but also the efficiency and mask of the constant current power supply. Light transmittance. Based on the luminous flux test at the corresponding power, we derive the luminous efficacy values ​​for each sample.


It can be seen that the Ou sample ceiling lamp has the highest efficiency value, and the Guanhua ceiling lamp sample has the lowest light effect value.


Color temperature



Let's take a look at the color temperature. The color temperature is a representation of the quality of the chromaticity of the light source. The chromaticity of the light source is the hue tendency and color saturation of the light of a light source. Although the color temperature of the light source is not a concept of brightness and darkness, the color temperature directly affects the brightness and contrast. At the same time, the color temperature has a great relationship with the human eye's perception of light color.


Philips and Opp sample ceiling lamps are intermediate color temperature, closer to natural light, softer, can give people a more refreshing feeling; Hongyan sample ceiling lamp more than 6000k, the overall cold color, relative to the bedroom, may be more suitable to install in the living room Use; Chau Ming Han source, Guanhua sample ceiling lamp for segmental dimming, can be adjusted between warm yellow light and cool white light, can create a stable atmosphere, but also create a cold feeling.


Significant


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 figure is a reference for the evaluation of color rendering index for general lighting places:



Philips, Op, Hongyan sample ceiling lamps have reached a high level.


Chromaticity space inconsistency



The inconsistency of chromaticity space reflects the uniformity of spatial distribution of product light color, especially when applied to some occasions with high requirements on light quality. The larger the value, the worse the uniformity of the chromaticity of the product.


Light intensity distribution



The light intensity is the luminous intensity of the light source or the luminaire in a certain direction, the direction of the light changes, and the light intensity (light intensity) also changes, and the intensity of the light intensity in the luminaire is equal to the length of the line segment, so that it can be considered that The line with strong light is long, and the line with weak light is short. It can be considered that a light-emitting point emits line segments of different lengths around it, and a section of the line segment is sequentially connected to form a "light distribution curve".


The illuminating intensity and illuminating angle of the five sample ceiling lamps are roughly equivalent.


Electromagnetic compatibility test


This test is based on GB 17743-2007 "Limitations and Measurement Methods for Radio Disturbance Characteristics of Electrical Lighting and Similar Equipment", GB 17625.1-2012 "Electromagnetic Compatibility Limits Harmonic Current Emission Limits (Device Input Current per Phase ≤ 16A) 》Test and evaluate.


â–¼ disturbance voltage (power terminal) 4.3.1


This is a measure of the nuisance of the luminaire from the power port, signal port to the grid or signal network.


Philips


The L line passes and the N line passes.


Op lighting


The L line passes and the N line passes.


Hongyan Electric


The L line passes and the N line passes.


Chau Minghan source


The L line does not pass and the N line does not pass.


Guanhua Lighting


The L line does not pass and the N line does not pass.


â–¼ radiated electromagnetic disturbance (30 MHz ~ 300MHz) 4.4.2


The purpose of this test is to establish a common standard to evaluate the resistance of the luminaire to RF emissions.


Philips



The horizontal antenna passes and the vertical antenna does not pass.


Op lighting


The horizontal antenna passes and the vertical antenna passes.


Hongyan Electric


The horizontal antenna passes and the vertical antenna does not pass.


Chau Minghan source


The horizontal antenna does not pass and the vertical antenna does not pass.


Guanhua Lighting


The horizontal antenna passes and the vertical antenna does not pass.


â–¼Harmonic current


Philips



The test passed.


Op lighting


The measured power of the sample is 22.9W. According to the compliance judgment flow chart of the harmonic standard, the non-gas discharge lamp of not more than 25W meets the standard requirement without testing. by.


Hongyan Electric


The measured power of the sample is 24.1W. According to the compliance judgment flow chart of the harmonic standard, the non-gas discharge lamp of not more than 25W meets the standard requirements without testing. by.


Chau Minghan source


The test did not pass.


Guanhua Lighting


The test did not pass.


This EMC test includes several tests of disturbance voltage, radiated electromagnetic disturbance and harmonic current. The EMC test of the luminaire product does not pass, which is easy to cause other electrical appliances in the vicinity of the luminaire to work abnormally. Therefore, it is also a major safety hazard of the luminaire.


Reliability test


Test and evaluation according to GB/T 2423.3-2006 "Electrical and Electronic Products Environmental Test Part 2: Test Method Test Cab: Constant Damp Heat Test".



Five branded ceiling lamp samples were passed under the experimental conditions.


The five models of ceiling lamps purchased at random in the market cover the current high and low-level brands at home and abroad. It can be seen that in various performance tests, the performance of each model is uneven, and some sample quality problems, of course. The market is selling the ceiling lamp brand far from this, we hope to provide consumers with more reference before buying.

At present, the market for ceiling lamps is fiercely competitive, especially in the low-end market. The brands are complicated and the choices are numerous. The consumer brand identity is gradually strengthened. The quality is excellent and the price is reasonable. It still attracts the attention of consumers. If it is still based on the previous reduction and price reduction. It is obviously not wise to adopt strategies to acquire the market. Increasing product cost performance and gradual cultivation of product brands and market appeal should become more and more important issues for major manufacturers.

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