菲利浦：LED灯具评估绩效白皮书（英文版）（7页）.pdf

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1、LED LuminairesWhite paperEvaluating performance ofLED based luminairesComparing the lifetime performance of LED based luminaires3What Philips Lighting publishes on initial performance To benefit from our standard development work in the IEC,initial performance specifications for all Philips Professi

2、onal Lighting Solutions Europe LED based(general)lighting luminaires are measured in compliance with the appropriate IEC performance standards.1.Initial rated input power(in W)2.Initial rated luminous flux(in lm)3.Initial LED luminaire efficacy(in lm/W)4.Luminous intensity distribution5.Initial Corr

3、elated Color Temperature(CCT)in K6.Initial rated Color Rendering Index(CRI)7.Initial rated chromaticity co-ordinate value and expected tolerance(x,y)x SDCMInitial specifications of all LED based luminaires are specified at an ambient temperature of 25C.2.IEC performance criteria Both initial and ove

4、r time performance have to beevaluated in order to have confidence how LED basedluminaires will perform and how long they will sustain their rated characteristics over their years of operation.At present,it can be difficult to know who to trust or what to believe.Standardization of performance requi

5、rements is animportant first step towards full transparency regarding the performance of LED based luminaires used in theprofessional market.Therefore,the IEC recently developed and published specific performance standards for LED based luminaires.These standards describe how to measure initialperfo

6、rmance and provide a lifetime metric for over time performance.It should be noted that initial product specifications willtypically be measured,whereas performance over time will be calculated using the IEC lifetime metric for LED based lighting products.Figure 3 Overview IEC standards LED based pro