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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5 B" d7 r3 v: @! h P( N% V, F1 P3 |
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
8 f9 p) j+ t5 U- f- v- O o( jof Solid-State Lighting Products$ k7 ^/ x: a3 U6 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。
; r) U, t* B! P第二个是 79流明光效测试报告。LM79整灯的吧。
0 c+ J: Q& P4 I9 i+ \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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L70 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).$ t6 h2 C) J" o
3 F1 W2 O3 G$ ~* t% hLM79, 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.) {$ B5 }$ x$ I
7 }4 u5 c7 Z& ~5 yLM80, 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.: _0 u; }; ]0 u6 L2 g5 N
- ]: ^& q4 i; o+ x& [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.1 q: n) y" J1 h0 V" U
Q:寿命L-70是啥
) ^4 d# B z" i& d& M* d5 m% IA:维持70%光通量的寿命
9 n; O! ?1 H8 K1 \# cQ:谢谢。学到东西了
6 I' R, {1 D U1 O `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
8 M! B+ ^# E1 G0 t0 L' a, @Q:明白了2 D4 I1 R2 P; K5 m1 s: L
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发表于 2018-6-29 10:47:25
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