IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements

ledpan

Q:各位大神，能帮我解释下这个吗，是LED路灯上面的
) X. J4 A, \$ i, oIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
of Solid-State Lighting Products
% c: E& X8 }/ D9 W( TA: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。
4 R( x# G* Q7 g$ o4 z% A第二个是 79流明光效测试报告。LM79整灯的吧。
- b$ Z( j5 E" m0 iThe LED lighting industry is awash with confusing jargon and abbreviations.  Here’s four for starters:- L70, LM79, LM80, TM21.  So what do they mean?

! o. Q6 ?9 |9 ^6 e$ i! w" `/ h' y6 UL70 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).

LM79, 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.
' \& f2 G  [9 F
. O% B1 z" q: gLM80, 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.

% U& q, v- N( H- G) q  d) GLM80 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.
, D* W" w, H+ I. @Q:寿命L-70是啥
& u7 R1 c, v% D% ^% Z# _A:维持70%光通量的寿命
) i4 }+ m% ]; W5 @Q:谢谢。学到东西了
) e1 k& }# U$ mA: 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
; Z; H1 s+ i  A) F; ]  @3 ]Q:明白了
+ V) s) ~: ]# Q7 A/ R& ]0 P2 j