As the fourth generation of lighting source, LED lighting has the characteristics of high luminous efficiency, energy saving, long service life, maintenance-free, high safety and reliability, and environmental protection. With the rise and popularity of LED lighting products, the quality of their products has also received more and more attention from the public. To this end, the reporter recently interviewed Changzhou Product Quality Supervision and Inspection Institute.
Safety pass rate is 80-90%
According to preliminary statistics, the safety rate of products checked from production enterprises is about 80%; the pass rate of product safety and performance commissioned by enterprises is about 70%.
Shi Chaoyang, executive deputy director of the National Semiconductor Lighting Product Quality Supervision and Inspection Center, told reporters that LED lighting products are too optimistic due to their rapid development and quality status and trends. LED lighting products for indoor lighting include various types of downlights, light bars, ceiling lamps, etc. Through the analysis of the inspection of LED lighting products, the unqualified items are mainly concentrated in four aspects: First, the power is not equal, the power of LED lamp marking Inconsistent with the standard limit power, generally large, easy to consume electricity; second, the luminous flux does not reach the manufacturer's declared value, generally low; third, the maintenance rate is not enough, due to chip quality and other issues, the light maintenance rate is not High, easy to darken; Fourth, structural, anti-shock protection and heat-resistant flame retardant of insulating materials are not qualified, which makes the original anti-electric shock protection of the lamp fail, resulting in safety hazards such as exposed parts or short circuit of live parts.
Shi Chaoyang said that China still uses the US "Energy Star" testing standards to test the safety performance and life of LED lighting products. Other supporting standards and supervision and management methods have not been perfected. As a national testing agency, it is currently in the early stage. The data collection, actively participate in the preparation of the national standard for "Semiconductor LED Lamp Reliability Test Method".
What kind of LED light is suitable for indoor lighting?
Shi Chaoyang said: "Not the brighter the more beautiful, the better. We should pay more attention to safety. We should choose lamps with high protection level, good structure and low color temperature." A lamp includes two parts, the lamp and the light source. To ensure the safety of use, such as the starting power of the LED light is very important, to ensure its sporadic integrity; the light source should have a good light color, its light and light temperature should meet the standard requirements, such as writing lights should have a low color temperature High color rendering index, restore the original color; high frequency lamps should pay attention to its stroboscopicity, because the safety is controlled by the national mandatory standards, and the optical characteristics such as power and luminous brightness are determined by the manufacturer itself. More LED lights should be considered for blue light hazards.
How to detect?
Safety, light source and longevity are called “three-way” for LED lighting products.
There are three basic indicators for detecting the safety of LED lighting products: one is dielectric strength, that is, resistance to voltage; the other is insulation resistance and leakage current; the third is grounding resistance.
Light source detection first measures the light color performance and characteristics through the integrating sphere. For the luminaire, a large distributed photometer is used to measure the light distribution to identify whether it causes light pollution to the surrounding environment. Secondly, the light color test is carried out with a flash cycle of 3000 hours or 6000 hours, which is qualified according to the requirements.
For the life of the luminaire, the life detection is generally carried out by the ignition point method, such as a bulb lamp, the ignition point is 2 hours and 45 minutes, and the light is extinguished for 15 minutes. After the general switch is 15,000 times, the igniting can still be normal, which is qualified.
Inspection route
The public has purchased LED lighting products. If they want to pass the test, they can send them to the National Semiconductor Lighting Product Quality Inspection Center for commission inspection. The inspection period of the regular projects is 10 working days. The number of inspection samples is determined according to the inspection requirements. The charging standard is implemented.
