How are we doing? What NGL tells us about the performance and quality of LED Luminaires - Presented by: Ruth Taylor. Dan Blitzer and Melanie Taylor

How are we doing? What NGL tells us about the performance and quality of LED Luminaires - Presented by: Ruth Taylor. Dan Blitzer and Melanie Taylor

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   Melanie Taylor,IALD, LEED BD+C; WSP Lighting Design  Dan Blitzer, LC; The Practical Lighting Workshop  Ruth Taylor, IES; Pacific Northwest National Laboratory
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  Partnerships link energyefficiency & lighting quality
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   Understanding NGL Judging criteria and the lighting design practice - observation and data  Key findings from the most recent competitions  Trends and outliers in NGL results over time  What’s ahead for NGL: sharper focus and in-depth evaluation
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   Inclusive ratherthan exclusive  Performance evaluation with extensive documentation  More time and resources than most designers can afford  Judged in characteristic applications and “hands on”  Diverse, professional judging panel
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   Approach  Criteria Installations  Evaluations  Selecting Winners
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   Organized byapplication  Product Evaluation  Installed and lighted  Table top (2nd fixture)  Documentation  Process  Independent judgment  Preliminary scoring  Discussion and decision  Post judging analysis & verification
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  • NGL Minimum efficacyrequirements typically match (higher in 2015) DLC DLC • Products are submitted through LF to enter the competition LED Lighting Facts • Documentation is reviewed by LF and NGL technical staff LF/NGL Doc Review • Judges evaluate products in-situ NGL In- Person Judging • Additional testing or review is conducted as needed before awards are announced NGL Awards
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  www.ngldc.org Notes from the judgesare key.
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   Criteria –what and why  Installations in intended applications  Deconstruction – understanding serviceability  Documentation  Get the facts  Check the facts  Know what you’re looking at and why
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  In-person evaluation:  Color Illuminance  Light distribution  Glare control  Serviceability  Controllability  Value  Aesthetic appearance  Bonus points Documentation analysis: • Luminaire Efficacy • Lumen maintenance
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  Evaluation is basedon visual evaluation of the color appearance, consistency, and rendering of the installed luminaire.
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  Color Rendering versuslighting output Color Rendering of specific colors Spectrum of LEDs can be modulated, plant growth lighting is an example.
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  Color temperature aedge of beam Color temperature between nodes in linear fixtures, grazers in particular Move back to warm, 2700K, now that we can use an efficient source with that color temp
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  Horizontal and/or verticalilluminance for the application must be appropriate according to accepted lighting practice.
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  Somewhat related toefficacy but more subjective Appropriate for the application Narrow, dim spot of light may be exactly appropriate for a bar counter
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  Evaluation based onvisual evaluation of the uniformity and contrast provided by the luminaire.
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  Striations and shadows Outerbeam of light Sharp cut-off at edge of beam Appropriate for the application
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  Luminaire brightness isevaluated in conditions as similar as possible to the intended application to assess discomfort glare and contrast.
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  Glare bombs! Multi-module vssingle module Quality is revealed when looking at glare control Does affect light output
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  Entries must demonstrateattention to specifier and user concerns about follow- on service and replacement in the event of component failure and replacement of LED modules at end of life.
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  Must be ableto describe replacement of modules and drivers to clients Is it accessible in place? Are instructions clear? May want to replace to higher efficacy/similar output module in the future
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  Purchase price iscompared to other traditional sources for the intended application.
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  Is the moveto LED worth the initial cost? Costs can vary dramatically for very similar fixtures. Make sure options chosen match the application, each option affects cost.
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  Evaluation is basedon subjective evaluation of the aesthetic appearance and style of the installed luminaire.
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  Quality and construction LeveragingLED module advantages – small size, point source, controllable Appropriate for application
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  Dimmability – colorconstancy, dimming range, dimming smoothness, start conditions, and other criteria Look at entire system Range of dimming Flicker, color shift, jumping, short dimming range Multiple control options
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  Innovation - takingadvantage of the unique LED characteristics Fixture designed for LEDs Leverage LED module characteristics Does not need to be 2’ x 4’
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  LEDS are changingour Industry Quality has improved quickly LED efficacy will help us meet ambitious energy goals More innovation to come
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   Will itperform as claimed?  Will it perform as expected for its intended us?  Will it perform as claimed/expected over time?  Will it dim as claimed/expected?  Will contractors have issues with installation?  Will it have color consistency issues across products and over time?  At end-of-life, will it be disposed of in a responsible manner?  How does its performance compare with other products?
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  General • Luminaire specificationsheet • Product photos/marketing materials LED Lighting Facts documentation • LM-79 test report (including sphere data)  LM-80 test report on LED package/module/array  LED package/module/array specification sheet  ISTMT on submitted model  ENERGY STAR TM-21 Calculation Other • Installation/serviceability statement • Driver specification sheet/dimming interface spec sheet (DMX, how to address) • Product warranty/end-of-life statement
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  LED Spec Sheet LM-80 Report ISTMT Report TM-21 Calculation
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  Lumen Maintenance % •Not a lifetime metric • % light output after a specified time vs. initial output • Measures source only - in thermal environment of luminaire Lifetime Metric • Includes all system components – Electronics – Optics – Thermal management – Housing No industry standard for lifetime is yet available.
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   A lotof interest in NGL!  Improving efficacy is real  Light output is increasing . . . Usefulness too.  Color may not be the concern it was  Color quality for outdoor can improve further  Serviceability remains an issue – focus for 2015  Controllability remains an issue – focus for 2015
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  2014 All Intents 2671,644 Judged 153 879 % of intents judged 57% 53% Awards 61 318 % of judged awarded 40% 36%
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  ALLPRODUCTS: INDOOR Year AVG lm/WAVG CRI AVG lm 2008 38 83 980 2009 45 81 1,292 2010 49 81 1,651 2012 59 81 2,856 2013 70 82 3,928 2014 79 83 5,405
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  ALLPRODUCTS: OUTDOOR Year AVG lm/WAVG CRI AVG lm 2008 45 73 4,011 2009 48 74 3,595 2010 60 73 4,647 2012 68 75 6,647 2013 100 76 11,375
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  All Entries
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  AWARDED
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  Outdoor Indoor All Awarded
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  Outdoor Indoor All Awarded
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  Outdoor Indoor All Awarded
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  Lm/W CRI 2014 AllBIC/Rec All BIC/Rec Downlights 71 71 83 82 Troffers 100 96 82 85 Industrial 101 100 81 81
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  0% 20% 40% 60% 80% 100% 2008 2009 20102012 2013 2014 High energy impact categories • Troffers • Downlights • Linear Pendants Low energy impact categories • Accent • Decorative • Wall Percent of Entries and Winners
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  Year Efficacy Requirement (lm/W) Avg.Efficacy Winners (lm/W) # 0f Winners Downlights 2008 35 46 6 2009 35 54 6 2010 35 49 9 2012 45 56 9 2013 50 NA 0 2014 55 71 12 Accent 2008 no min 29 6 2009 35 38 5 2010 35 40 11 2012 35 53 9 2013 40 59 7 2014 45 63 9 Troffer/Utility 2008 no min 72 1 2009 35 52 1 2010 35 48 1 2012 60 87 10 2013 80 93 13 2014 85 97 8
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   Higher efficacyrequirements  Limited categories  Digital controls  More in-depth serviceability evaluation  Main performance criteria stays the same  Focus on color tuning (indoor) and pedestrian scale (outdoor)
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   Push theenvelope – higher efficacy minimums  Focus on key issues  Controls  Serviceability  Fewer entries for more focused evaluations  More realistic installations for more accurate evaluations
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  LIGHTFAIR International 2015– DOE SSL Booth LIGHTFAIR NGL Presentation - Monday May 4, 2-5 pm Time and Money: Installation and Serviceability of LED Luminaires