Because of the durability, energy saving and better price of LED lamps, LED lamps are now more and more popular among families. However, because LED lamps are rapidly emerging in the past two years, many people are still not very clear when purchasing. Need to pay attention to what problems, let's take a look at Xiaoyou.
First, buy attention to the certification mark
For how to buy LED lamps, Yang Zheng, an expert in electric light source, said that consumers need to check whether the lamps have clear product trademarks and certification marks. The reporter learned that the current certification of lamps includes 3C certification, CE certification, UL certification, GS certification. Among them, the most common in China is 3C certification and CE certification.
The author understands that 3C certification, that is, China Compulsory Product Certification, is also known as CCC certification. Household appliances, wires and cables, etc. must be certified. CE certification is a mandatory requirement of the EU law for related products. Any product (involved in the new method directive), whether it is produced by the EU or EU member states, must be freely circulated in the EU market. Before being placed on the EU market, they must comply with the requirements of the Directive and relevant harmonized standards, and affix the CE mark, while the electrical products need to be affixed with the CE mark. If these markings are attached to the LED luminaire, the safety performance of the sample is certified. Yang Zheng suggested that when purchasing lamps, you should also check whether the wires have passed 3C certification.
Second, check whether the product information is complete
The quality of the trademarks of high-quality products is good, even if wiped with a soft damp cloth, it will not be easily rubbed off. Yang Zheng reminded that you can check whether the marked font/pattern is clear and flexible, firm and wearable (cannot be wiped off), and the position is correct. The complete marking information of a luminaire should include the following aspects: 1. Source (factory name, site, trademark, contact information); 2. According to the standard (executed product standard, expressly promised indicator parameters); 3. Basic performance parameters ( The equivalent of replacing the incandescent lamp, including electrical parameters including working voltage, working current, power, harmonic current, etc.; optical parameters including luminous flux, luminous efficacy, beam angle, etc.; color temperature and color rendering index; Light decay, etc.)
Third, the use of environmental requirements can not be ignored
Yang Zheng said that the luminaire should also have specific environmental requirements, including the ambient temperature or range of the luminaire, and the specific operating temperature.
Products should also be marked with anti-shock rating, dust-proof and anti-solid clothing and waterproof rating. “The luminaire should also have installation instructions.†Yang Zheng said that similar warning instructions and installation materials should not be ignored. For example, some lamps are only suitable for direct mounting on the surface of non-combustible materials.
Fourth, seeing the hand touch can also be shaken
After completing the above information inspection work, Yang Zheng also suggested that consumers feel the quality of the lamps by touching them by hand. Can I check if the appearance of the product is very rough? Is there any glue that is not cleaned? Is there a screw that protrudes from the fixing plane? Does the color of the screw match the color of the outer casing? Is there any sharp edges or scratches on the surface? He said that from Appearance, good luminaire processing is fine, the color is pure, the surface layer is good overall, the parts of the link have no flaws in appearance, and the dimensional consistency is good.
In addition to watching, Yang Zheng said that the luminaire should have a certain ability to resist external forces, so when buying a luminaire, you can use force to shake it to check whether parts are falling off or loose.
5. Lighting the lamp to observe the color and heat dissipation
Relevant experts of the China Lighting Association pointed out that the quality of the product can be judged according to the color change of the LED light and the heat dissipation. When the observation lamp is lit, the color changes. If it is changed from yellow light to white light in a short time, or white light turns into white light with blue color, experts do not recommend purchasing such a product. Experts pointed out that the color of the light should be consistent and not flashing.
After the LED lamp is started, it can contact the surface temperature of the product to detect the heat dissipation of the product. High-quality LED lamps are stable in 30 minutes. If the surface temperature of the product continues to rise within 1 hour, do not choose this product, because heat dissipation and other factors will affect the life of the product.
Edit: Bober
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