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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! H+ Q% P2 T, q( Z* d2 k, W
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements* ]7 H, N3 a- C- n
of Solid-State Lighting Products% q. d/ N4 {% L2 ~0 @
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。7 I: S& C0 ~& ]5 V2 Z# X% f
第二个是 79流明光效测试报告。LM79整灯的吧。0 z _8 T @2 L* @( L0 |
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).
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# C) ~ l% } ?% O5 e: N# 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.( I" C+ z3 h% a9 f) B' n* P; B S
: v6 P: \' j+ v6 X |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.3 a5 w4 c2 y% O7 p) G# p
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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.
N" ^$ f9 g( E' t; ~Q:寿命L-70是啥8 F4 Z2 F2 H3 }7 O
A:维持70%光通量的寿命
' d6 U+ i; ^, A p, CQ:谢谢。学到东西了
9 N# \/ t) Z3 {; WA: 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
$ a) \7 A/ [6 e' X6 z& xQ:明白了5 Q8 \# G( b( m* [( P
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