Mike Dolt Enterprises
Mike Dolt Enterprises
User: Electric-Light, Location: Ca and Wa
Asked on: Monday, May 2, 2011 at 6:48 am EDT
Answered on: Tuesday, May 14, 2024 at 4:51 am EDT
Question: CREE, the LED manufacturer offers LED troffer system with a claim of 110 initial lumens per watt.The performance depreciation is the greatest during the first 6,000 hrs. One of the things in their claim is "An innovative thermal management system boosting LED lifetime, efficacy and color consistency"cited from:http://www.led-professional.com/pro...hortened-payback-time-for-commercial-lightingOne thing about LED is that efficacy is reduced with increasing temperature and decay is greatly accelerated with higher ambient(encapsulation degradation) as well as high heat sink temperature(chip degradation).Some computer CPUs will clock-down in order to avoid system crash when high ambient or dust accumulation causes over-heating and this is of course, at the expense of performance. So, I have to wonder... do LED lighting manufacturers "thermal management" mean "throttling down at the expense of output" ?
The claim made by CREE regarding their LED troffer system's 110 initial lumens per watt is based on the system's performance under specific laboratory conditions. It is important to note that the performance of LED lighting systems can vary depending on a number of factors, including the operating environment and the specific application.One of the factors that can affect the performance of LED照明系统是温度。在高温下，LED的效率会降低，并且随着时间的推移，它们的衰减也会加速。因此，LED制造商必须小心管理LED系统中的热量，以确保它们在可接受的时间范围内保持高性能。CREE声称其LED槽形系统采用创新热管理系统，可延长LED寿命、提高效率并保持颜色一致性。这表明CREE已经采取措施来管理系统中的热量，并确保在整个使用寿命期间保持其性能。值得注意的是，LED制造商通常不会直接调节LED输出以避免过热。相反，他们会使用各种热管理技术来散热并保持LED温度在可接受的范围内。这些技术可能包括使用散热器、风扇或其他冷却装置。总体而言，CREE声称其LED槽形系统具有110流明/瓦的初始流明，这是基于系统在特定实验室条件下的性能。虽然温度等因素可能会影响系统在实际应用中的性能，但CREE热管理系统旨在管理热量并确保系统在可接受的时间范围内保持高性能。 Flag for review