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Key criteria for selecting an LED solution

Key criteria for selecting an LED solution . Marco Wendling Lietcorp GmbH. Selecting an LED based solution …. B rand. Product features. A new and sometimes large selection … . K nown brands ( selection ). Emerging brands ( selection ). LIETCORP. +. +. Known brands.

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Key criteria for selecting an LED solution

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  1. Key criteria for selecting an LED solution Marco Wendling Lietcorp GmbH

  2. Selecting an LED basedsolution…

  3. Brand Product features

  4. A new and sometimes large selection… Knownbrands (selection) Emerging brands (selection) LIETCORP

  5. + + Knownbrands Emerging brands • Focus on niche • Electronic expertise • Creative • Flexible • Dedicated • Wide range • Lightingexpertise • Reliability • International presence ! ! • Limited portfolio • Capacity • Reliability • Sustainability • Flexibility • Business model • Pricing • Dedication Select by company size or level of awareness is not a guarantee of successIt is above all the feature/requirement/trust ratio which premium

  6. Productfeatures • Technical specs • Quality – Safety - Warranty • Price

  7. Productfeatures: technicalspecs Technical specs to consider • Efficacy (lm/W) • Colourtemperature (K) • Colourrendering (CRI) • Binning • Lifetime <-> Thermo-management • Glare

  8. Technical specs: initialvs final efficacy

  9. Technical specs: initialvs final efficacy Itisalwayskeytocomparethe final light outputofthesystem. For LED fittingsitiscrucialtogetthe final „hot“ light outputand not theinitial LED value.

  10. Typical CRI values Incandescent 100 Halogene 100 Fluorescence 80-90 MH ceramic 80-95 HP Hg 45-60 HPS 25 LED 65 - 95 Technical specs: colourrenderingindex The CRI is reflecting the average value basing onstandardreferencevalues 9 Deepred 10 Deepyellow 11 Deep green 12 Deepblue 13 Skin 14 Chlorophyll 1 Old pink 2 Mustardyellow 3 Yellow green 4 Light green 5 Turquoise 6 Light blue 7 Purple 8 Lilac The higherthe CRI thelowerthesystemefficacy

  11. Technical specs: colourrenderingindex LED CRI 80 DECHARGE CRI 80 R9 = 27,8 R12 = 62,9 R9 = 0 R12 = 95 Source : iLED + OSRAM

  12. Technical specs: binning The LED binning assures the homogeneityfrom LED to LED as well as the homogeneity of the complete installation Source : OSRAM Fine binning example Note : a binning indication in +/- Kelvin gives only a limited indication MacAdam steps (SDCM): Area in which no colour difference is visible Colour differences gets visible above the value of 3 Only a MacAdamsStepsvalueisgranting a goodhomogeneityof an LED basedlightingsystem.

  13. Technical specs: system lifetime Light output maintenance / lifetime ratio Example MH 70W Initial lm ECG : 6600 lm Average L70 lmECG : 5250 lm = 80% LED Source : ENDO

  14. Technical specs : system lifetime Exampleandinterpretation of an LED lifetime curve

  15. T° • More temperature • Shorter lifetime • Less light output A • More current • More light output • Shorter lifetime Temperature Light output C° • Good thermomanagement • More light output • Longer lifetime Lifetime Temperaturecontrol=Lifetimecontrol Technical specs: system lifetime A good thermal managementofthe LED systemsgrantsthespecified/extrapolatedlifetimevalue. Current Source : OSRAM

  16. Technical specs: glare A topic toconsiderwith attention • An LED based system can show very attractive technical features • In the application the result can unfortunately be very disappointing for the users • LED light sources have a very punctual light emission surface creating very high luminance values • It is very important to consider this topic when considering an LED lighting system especially when it comes to illuminate work spaces

  17. Productfeatures • Technical specs • Quality – Safety - Warranty • Price

  18. Productfeatures : Quality, Safety, Warranty There is no “golden rule”, nevertheless... • Objectively: • Technicalspecifications • Precision of documents • Certified light distribution curves • Warrantyclaim and conditions • Subjectively: • Reliability / experience of provider • Provider profile : manufacturer or distributor

  19. Productfeatures • Technical specs • Quality – Safety - Warranty • Price

  20. Productfeatures: Price There is no “good price” but always a “right price”... • Objectively: • Technicalspecifications • Performance required • Warrantyclaim and conditions • Subjectively: • Reliability / experience of provider • Provider profile : manufacturer or distributor

  21. Thanksforyourattention!Q&A

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