29 yuan cost-effective Tsinghua Tongfang LED bulb evaluation
The product of this evaluation is Tsinghua Tongfang 5W LED bulb , model is WJE270GB05W01, we can see from the model that the interface of the product is E27 screw, the nominal power is 5W. The LED lamp is priced at 29 yuan in Jingdong Mall. As for the price performance of the product, let us find out about it.
This review mainly includes product review, product packaging label, product appearance and workmanship details, power performance and difference, illuminance performance and illuminance uniformity test, color temperature control, stroboscopic test, color reproduction test and final summary. . A detailed parameter list of the product will be given at the end of the text. You can also click on the tab title below to go directly to the corresponding pagination page.
This review mainly includes product review, product packaging label, product appearance and workmanship details, power performance and difference, illuminance performance and illuminance uniformity test, color temperature control, stroboscopic test, color reproduction test and final summary. . A detailed parameter list of the product will be given at the end of the text. You can also click on the tab title below to go directly to the corresponding pagination page.
Before opening the outer packaging, we will do a simple analysis of the product packaging. This product is packaged in a color carton. After observing the entire package, we found that it is really only a simple analysis of the package.
Tsinghua Tongfang LED bulb lamp packaging information is rare
The product's packaging does not contain useful product information. If you don't have a product sketch on the side, I believe most people can't see it. This is an LED light. In addition to the product trademark and the sketch composed of lines, the packaging is the scope of application and safety precautions. The bottom of the package is the CE certification mark, CQC certification and the Restriction of Hazardous Substances (RoHS), but there is no information on toxic and hazardous substances.
Safety precautions on product packaging
In general, the packaging information of this product is too simple, lack of useful product information, it is difficult for users to distinguish products directly from the packaging; there is no parameter information of any product, which is not conducive to the use of the product.
Perhaps for the versatility of packaging on different products, the lack of information about the product packaging also makes us curious about the internal products, let us open the package to see what.
After opening the outer packaging, we found a product manual and certificate in the package. Unfortunately, the product manual is only a general specification for LED bulb products. It does not provide information about the parameters of the product. It only describes the product introduction and product application range.
Tsinghua Tongfang LED Bulb Product Packaging and Instructions, Certificate
Transient voltage suppression diode, also known as a TVS diode, is a protective electronic component that protects electrical equipment from voltage spikes introduced by wires.
TVS diodes are placed in parallel with the circuit to be protected. When its voltage exceeds the burst breakdown level, excessive current is directly shunted. TVS diodes are clamps that suppress excessive voltages that exceed their breakdown voltage. When the overvoltage disappears, the TVS diode automatically resets and absorbs much more energy than a similarly rated crowbar circuit.
TVS,TVS DIODE,Transient voltage suppression diode
Changzhou Changyuan Electronic Co., Ltd. , https://www.changyuanelectronic.com