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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! D% ?8 V; l* y0 N& f& \
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements6 ^4 k4 M: ?, b
of Solid-State Lighting Products
0 ?* X' E+ W8 y9 Y3 L8 CA: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。
' h4 m' l J8 V$ \) J, E- Q第二个是 79流明光效测试报告。LM79整灯的吧。
, k+ P3 |# L% \% B- T# X) mThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?: @) |* G+ K+ s0 n! W& K5 G
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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).; @2 ?- t& y9 T
0 m' I9 i" s8 U& b) 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.+ F0 K& s9 U3 C
% ]6 R5 P, w& bLM80, 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.& k/ \0 n( G( p) q( u2 j
Q:寿命L-70是啥8 U$ i! o2 Q5 H, U, _5 [
A:维持70%光通量的寿命0 W7 k5 D# D$ z* L# c0 `- L
Q:谢谢。学到东西了
- x! [9 [; Y0 q' N/ i0 j0 eA: 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+ J# k, e$ O, x
Q:明白了: f# M& M- |: J# h7 t. t1 X
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发表于 2018-6-29 10:47:25
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