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1、Conversion-PPF(μmolm-2s-1)toLux NOTE:TheconversionfromPPF(μmolm-2s-1)toLuxvariesunderdifferentlightsources.Foracompletediscussionpleaseseethereferencelistedbelow.ConversionFactorsPPF(μmolm-2s-1)toLuxLuxtoPPF(μmolm-2s-1)Sunlight54Sunlight0.0185CoolWhiteFluorescentLamps74CoolWhiteFluorescent
2、Lamps0.0135MogulBaseHighPressureSodiumLamps82MogulBaseHighPressureSodiumLamps0.0122Dual-EndedHighPressureSodium(DEHPS):ePapillion1000W77Dual-EndedHighPressureSodium(DEHPS):ePapillion1000W0.0130MetalHalide71MetalHalide0.0141CeramicMetalHalide(CMH942):standard4200Kcolortemperature65CeramicMe
3、talHalide(CMH942):standard4200Kcolortemperature0.0154CeramicMetalHalide(CMH930-Agro):3100Kcolortemperature,spectrumshiftedtoredwavelengths59CeramicMetalHalide(CMH930-Agro):3100Kcolortemperature,spectrumshiftedtoredwavelengths0.0170MultiplythePPFbytheconversionfactortogetLux.Forexample,full
4、sunlightis2000μmolm-2s-1or108,000Lux(2000∗54).MultiplytheLuxbytheconversionfactortogetPPF.Forexample,fullsunlightis108,000Luxor2000μmolm-2s-1(108,000∗0.0185).PPFtoLuxReferenceTablePPF(μmolm-2s-1)Lux(Sunlight)Lux(HPS)Lux(MetalHalide)Lux(Fluorescent)10540820710740105408207107401005,4008,2007
5、,1007,40020010,80016,40014,20014,80030016,20024,60021,30022,20060032,40049,20042,60044,400100054,00082,00071,00074,0002,000108,000164,000142,000148,000DefinitionsPhotometricUnits,IlluminanceFoot-candle:onelumenpersquarefoot. The16thGeneralConferenceonWeightsanMeasures(CGPM),Oct.1979,decide
6、dthatthecandelaistheluminousintensityofasourceemittingmonochromaticradiationoffrequency540x1012Hzandradiantintensity1/683wattpersteradian. Thiscorrespondsto683lumensperwattofradiationatapproximately555nmwavelength,whichisnearthemaximumofthestandardphotopicspectralluminousefficiencycurve.LU
7、X:onelumenpersquaremeter;differsfromfoot-candlebyaboutafactorof10.QuantumUnits,PhotonFluxDensityMicroeinstein:persecondandsquaremeter(μEm-2s-1). TheeinsteinhasbeenusedtorepresentthequantityofradiantenergyinAvogadro'snumberofphotonsandalsoAvogadro'snumberofphot
