LED enterprises need to be alert that LED lights are returned due to color temperature deviation1

In LED products, color temperature is related to the color characteristics displayed by LED lighting products. General lamps also have color temperature specifications. The higher the color temperature, the lower the comfort level of people. A few days ago, a batch of LED lights produced by a company in Yuyao were exported to Denmark because the color temperature did not meet the customer's requirements, but they were returned to the country for rework. In LED products, color temperature is related to the color characteristics displayed by LED lighting products. General lamps also have color temperature specifications. The higher the color temperature, the lower the comfort level of people. A few days ago, a batch of LED lights produced by a company in Yuyao were exported to Denmark because the color temperature did not meet the customer's requirements, but they were returned to the country for rework. As the name implies, color temperature is the temperature of color, which is an indicator to measure the color of white light. The light that people usually see is composed of spectra of seven colors of light, but some of them are blue and some are red. color temperature is a method specially used to measure and calculate the color composition of light. In physics, color temperature is the heating of a standard black body. When the temperature rises to a certain extent, the color begins to change from crimson-Light red-Orange Yellow-White- Blue gradually changes. When the color of a light source is the same as that of a black body, we call the temperature of the black body the color temperature of the light source in K (Kelvin). A few days ago, a batch of LED lights produced by a company in Yuyao were exported to Denmark because the color temperature did not meet the customer's requirements, but they were returned to the country for rework. The Ningbo customs inspection and supervision staff immediately investigated the goods in accordance with the requirements of the inbound repair process. After on-site investigation, it is found that the specific reason for the return is that the quality of the lamp beads provided by the LED lamp bead supplier is unstable, resulting in a large deviation in the actual color temperature of most LED lamps compared with the sealed sample confirmed by the customer. as a result, the customer's sales difficulties can only be returned and rectified. Similar incidents have occurred frequently. Before Yuyao's film and television equipment company produced a batch of LED film and television lamps exported to Canada, they were returned for the same reason. The quality of the lamp beads provided by the LED lamp bead supplier is unstable, resulting in the actual color temperature of most LED film and television lamps being about 6000 K, which is higher than the customer's requirement of 5300- 5900K color temperature range, too high color temperature makes the light color blue, which will have a negative impact on film and television post-production. In LED products, an important specification index is color temperature, which is related to the color characteristics displayed by LED lighting products. General lamps also have color temperature specifications. The higher the color temperature, the lower the comfort level of people. The LED packaging process currently adopted can obtain LED white light sources with different color temperatures by applying fluorescent powder with different excitation wavelengths and adjusting the amount or proportion of fluorescent powder. The color temperature can generally be divided into warm White (2700-4500 K), White (Natural White, 4500-6500 K)Cold White (Above 6500 K)Three. The yellow light ratio of low color temperature light source is relatively large, while the blue light ratio of high color temperature light source is relatively large. Lighting is not only for lighting, but also plays a role in beautifying decoration and adjusting mood. For example, the living room can choose white, giving people a bright sense of security, and it does not need to be too dazzling. this looks like the living room is wider; The study can choose cold white, giving people a refreshing and refreshing feeling, which is easy to improve work and study efficiency; The restaurant is suitable for using warm white light to create a warm atmosphere. Such as the national standard GB29294- 2012 the performance requirements of LED downlights stipulates that the correlated color temperature of household LED downlights is recommended not to exceed 5000 K. The standard stipulates that LED downlights with correlated color temperatures of 5700K and 6500K are limited to commercial lighting. To this end, it is recommended that relevant export enterprises: On the one hand, strengthen product testing and control capabilities. As the color temperature of LED has some deviation, it is mainly caused by the proportion difference of fluorescent powder in the packaging process, but it cannot be distinguished by naked eyes. therefore, integrating ball quantitative detection is carried out on LED lamp beads purchased in each batch to ensure that light parameters such as color temperature and display index meet the standards or customer requirements. On the other hand height attention early warning information. Refer to the sensitive focus issues involved in the notification recall, foreign returns, and high-risk quality and safety projects to rectify, and work hard to clarify the specific product requirements and response plans that need to be mastered, and promote sustainable export growth.