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LED Lights Will Be Returned Due To Color Temperature Deviation
Oct 27, 2018

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In LED products, the color temperature is related to the color characteristics displayed by LED lighting products. Generally, the lamps also have color temperature specifications. The higher the color temperature, the lower the comfort of people. A few days ago, a group of LED lights produced by a company in Yuyao exported to Denmark did not meet the customer's requirements because of the color temperature, but they were repatriated to China for rework.


What is "color temperature"?


Color temperature, as its name suggests, is the temperature of the color, which is an indicator of the color of white light. Usually the light that people see is composed of the spectrum of seven shades of light, but some of them are blue and some are reddish. The "color temperature" is a method used to measure and calculate the color components of light. In physics, the color temperature is a standard black body heating. When the temperature rises to a certain extent, the color begins to change gradually from deep red-light red-orange-white-blue. When a light source and black body have the same color, we will The absolute temperature of the black body at that time is called the color temperature of the light source, and the unit is K (Kelvin).


A few days ago, a group of LED lights produced by a company in Yuyao exported to Denmark did not meet the customer's requirements because of the color temperature, but they were repatriated to China for rework. The Ningbo Customs inspection and supervision staff immediately investigated the situation of the goods in accordance with the requirements of the process of returning goods. According to the on-site investigation, the specific reason for the return is that the quality of the lamp bead provided by the LED lamp supplier is unstable, which causes the actual color temperature of most LED lamps to be more deviated than the customer-confirmed package. As a result, the sales difficulties of customers can only be returned and rectified.


Similar incidents have occurred frequently. Before a film and television equipment company in Yuyao produced a batch of LED video lights exported to Canada, it was returned for the same reason. The quality of the lamp bead provided by the LED lamp bead supplier is unstable, resulting in the actual color temperature of most LED film and television lamps being around 6000K, which is higher than the customer's requirement for the color temperature range of 5300-5900K. The excessive color temperature makes the color of the light blue, and the film and television later Production will have an adverse effect.


An important specification in LED products is color temperature, which is related to the color characteristics displayed by LED lighting products. Generally, lamps also have color temperature specifications. The higher the color temperature, the lower the comfort of people. At present, the LED packaging process uses LEDs with different excitation wavelengths to adjust the amount or proportion of phosphors to obtain LED white light sources with different color temperatures. The color temperature can be generally divided into warm white (2700-4500K) and white ( Natural white, 4500-6500K), cool white (6500K or more) three. The low color temperature source has a relatively high proportion of yellow light, while the high color temperature source has a relatively large proportion of blue light. The lighting is not only for lighting, but also plays the role of beautifying the decoration and adjusting the mood. For example, the living room can choose white, giving people a bright sense of security, but also does not need to be too glaring, so that the living room is wider; the study can be Choosing cool white gives people a refreshing and refreshing feeling, which makes it easy to improve work and study efficiency. The restaurant is suitable for warm white light to create a warm atmosphere. As specified in the national standard "GB29294-2012 LED Downlight Performance Requirements", it is recommended that the relevant color temperature of household LED downlights does not exceed 5000K. The standard specifies that LED downlights with 5700K and 6500K correlated color temperatures 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. Since the color temperature of the LED is somewhat deviated, it is mainly caused by the difference in the proportion of the phosphor in the packaging process, but the naked eye can not distinguish it. Therefore, the LED ball beads purchased in each batch are subjected to integral sphere quantitative detection to ensure the color temperature. , display index and other optical parameters meet the standards or customer requirements. On the other hand, it is highly concerned about warning information Refer to the notification of recalls, sensitive focus issues related to foreign returns, and high-risk quality and safety projects to rectify, work hard to clarify the specific product requirements and solutions that need to be mastered, and promote sustainable export growth.


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