Lisun develops LED test tools for lumen maintenance evaluation
LEDLM-80PL is developed based on the mature system of LPCE-2 (LMS-9000A). In the hardware, LEDLM-80PL still adopts a high accuracy CCD spectroradiometer to maintain high precision. And the most important is the software, which is the essence of the LPCE-2 test capability. Then it combines with the Arrhenius model to build a newly reliable LED lifetime prediction software. Users will only need to test the lamp for hundreds of hours under certain temperatures, then the software will calculate the time to 70% (50%, 30%) lumen maintenance at this temperature; it will greatly help to improve the test efficiency, accuracy, and reliability of LED lumen maintenance testing.
Compared with the traditional light source, theoretically LED lifetime can reach 50,000 hours. So it is hard to test LED lifetime, because it is impossible to light up the LED till it dies, and it is also unworkable because there are so many different types and different power of LEDs. If the problem cannot be solved, it will create resistance to development and adoption of LED products. Considering the real situation, IESNA passed the LM-80-08 approved method, which provides the guidance and specification for measuring and recording LED lumens vs time, and calculating the lifetime of LED luminaires in the end. Also it solves an urgent problem for the LED industry.
When we say LED lumen maintenance and LED aging life, we talk about LM-80, TM-21, TM-82, etc. so it is necessary to explain them. LM-80-08 put forward the measurement method and then obtains the data; TM-21 put forward the calculation method and then obtains the data. In those standards, L70, L50, L30, etc., means the time to 70% lumen maintenance, time to 50% lumen maintenance and time to 30% lumen maintenance. From the data, we can find lumens changing along with the time. Generally speaking, time to 70% lumen maintenance will be defined as the LED lifetime.
Contact:Mr. Sam Gan - Lisun
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