IESNA-LM-80 (SSL-Solid State Lighting Product Source Luminous Flux Maintenance Measurement Method) is a measurement standard and measurement method for the luminous flux maintenance rate of LED light source proposed by the North American Lighting Association for the third generation of solid-state lighting products. Its main purpose is to measure and record. The LED luminous flux is maintained over time, simply by measuring the lifetime of the LED light source. Compared with traditional lighting products, the life of LEDs can theoretically reach 50,000 hours. Therefore, measuring the life of the LED is relatively difficult, because we can't keep the LED light on and then wait until it is naturally extinguished. This is not only time-consuming and laborious, it is not feasible, but also for the LED industry research and promotion. Will cause a lot of resistance. Moreover, the range of LED lamps is wide, and the power of the lamps varies. If the above method is adopted, it is fundamentally difficult to solve this problem. In response to this situation, the North American Lighting Association discussed and adopted the LED industry LM-80-08 standard and measurement method, which mainly guides and regulates how to measure and record the change of LED luminous flux with time, and finally calculate the service life of LED lamps. Hours. The formulation and adoption of this standard has fundamentally solved the problems that the LED industry needs to solve. When it comes to LED lamp lumen maintenance and life testing, we will talk about LM-80, TM-21, etc. In this case we need to explain LM-80-08, TM-21, TM-82, L70, etc. Relevant standards and measurement calculation methods. The LM-80-08 is for luminaire measurement methods and gets the data, while the TM-21 is for the luminaire calculation method and analyzes the data to get the results. Among these standards and measurement methods, there will be mentioned L70 hours, L50 hours, L30 hours, etc., that is, the time to maintain 70% of the luminous flux, the time to maintain the 50% luminous flux, and the time to maintain the 30% luminous flux. Here we can see the change of luminous flux and various data over time in each stage. Generally speaking, the time of 70% luminous flux maintenance rate of LED lamps can be defined as the life of LED. Normally, the LM-80 requires and the specified test time is at least 6000h, and the recommended test is 10000h. The temperature of the luminaire test is mainly set to three points; 55°C, 85°C, and the third temperature point is based on the actual situation. Set it yourself. In general, the measurement report under the LM-80 standard includes the following parts; the number of LED light sources tested, LED light source description, auxiliary equipment description, duty cycle, environmental conditions (airflow, temperature and relative humidity), case temperature (test point) Temperature), driving current of LED light source in life test, initial luminous flux, forward voltage in photometric current, data of luminous flux maintenance rate of each LED light source, and intermediate value, standard deviation, minimum luminous flux maintenance rate of all LED light sources And the highest value, LED light source failure includes the condition and time of the fault, the LED light source monitoring interval, the photometric measurement uncertainty and the change of the chromaticity of the LED light source during the measurement. In order to meet the requirements of the above standards, LPCE-2 (LMS-9000A) high-precision spectroradiometer and integrating sphere test system developed by Shanghai Lijun Electronics not only meets the requirements of CIE, EN and LM-79 clause 9.1, but also Can meet the requirements of LM-80. When meeting the general test requirements, the R&D personnel also considered and designed another version of the software that meets the LM-80 requirements in the R&D test software. The LPCE-2 (LMS-9000A) system has two operating software; The kind is to meet the general test requirements, such as testing luminous flux, color temperature, color rendering index, light effect and other light color electrical parameters; the second version of the software mainly tests and records the change of LED light flux with time, according to these data we can roughly calculate The number of hours of life of the LED lamp. However, the test system is mainly used for the general measurement of lamps, that is, light, color, electricity and other parameters, and mainly meets the requirements of the LM-79-08 standard. The life test is only an auxiliary measurement method of the system for the LM-80 standard. The test data results and reports cannot be regarded as the final evaluation of the luminous flux maintenance rate and life of the LED lamps, so according to LM-80-08, TM-82, TM- 21 and other international standards, the latest development of LEDLM-80PL_LED aging life test system is completely in accordance with the above standards. The LEDLM-80PL was developed on the basis of the mature system of LPCE-2 (LMS-9000A). In hardware, LEDLM-80PL still uses LMS-9000A high-precision CCD spectrometer to ensure the accuracy of test data. The core of this system lies in software. The software part is based on LPCE-2 (LM-80) test software. A new and reliable LED aging test software built with the Arrhenius model. Users only need to test for hundreds of hours at a specific temperature. The software can calculate the time when the test fixture maintains 70% of the luminous flux at this temperature, and maintains the 50% luminous flux time, which greatly improves the time. Test efficiency and stability and accuracy of LED lamp aging life measurement. [Edit: Xiaosu] Tubular Motors with AC power supply Ac Tubular Motor,Radio Receiver In Tubular Motor,45Mm Receiver In Tubular Motor,Am45 Built-In Receiver Tubular Motor GUANGDONG A-OK TECHNOLOGY GRAND DEVELOPMENT CO.,LTD. , https://www.a-okmotor.com