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Q:各位大神，能帮我解释下这个吗，是LED路灯上面的; `; g- c" f( B* j
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements o9 j) B1 |* z P7 X
of Solid-State Lighting Products% P# P8 n3 o) t3 P/ J8 E+ k) f
A:那些认证挺像西班牙AENOR的，第一个里面，CE里面的LVD 跟EMC可能有包括。
; @' x3 d. n: b1 h A第二个是 79流明光效测试报告。LM79整灯的吧。. r; B \9 G% v$ P2 k; d% [
The LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?
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1 R1 J! \2 J, C% J4 QL70 is simply a measure of the time taken for a light source to degrade to 70% of its original output. It is usually measured in hours and usually refers to degradation of total light output ie lumens. As in “my new LED L70 is 123hours” (not a good result, must try harder).
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+ Z9 V( J' b1 d8 v2 W/ PLM79, more properly referred to as “LM-79-08” is a Test Method authored by the Illuminating Engineering Society of North America (IESNA) titled “Approved Method: Electrical and Photometric Measurements of Solid-State Lighting Products”. This essentially defines a set of methodologies for laboratory testing of solid state luminaires and other light sources.
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LM80, more properly referred to as “LM-80-08” is also a Test Method authored by the IESNA. It is titled “Approved Method: Measuring Lumen Maintenance of LED Light Sources”. In contrast to LM79 this defines a test method for long-term life testing of component-level LED devices.
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LM80 is not much use on its own and does not of itself define how to extrapolate lab-measured LED lifetime test data to enable future lifetime prediction. That’s where TM21 comes in. Full name “TM-21-11”, titled “Projecting Long Term Lumen Maintenance of LED Light Sources”, TM21 details how to extrapolate short-term LED component test data to predict future performance.
' r: I& J" J2 w9 c/ h0 A' C: t0 P, n7 NQ:寿命L-70是啥
# h) g) I7 h, v- h4 v7 y: bA:维持70%光通量的寿命0 H- u, Y$ E7 {
Q:谢谢。学到东西了4 o1 M. a5 d& M' B- F) Y) D+ E+ e
A: 你这个要的就是一个IES报告，LM79测试报告里面就有，还有IEC里面的60598的测试报告，还有LM80报告，这个报告里面包含了TM21报告的
1 x$ w( f+ O3 ^- n* p! U: ]Q:明白了: i2 s+ V# }, w J# g$ @
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发表于 2018-6-29 10:47:25
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