This seminar will help participants to gauge the progress of LED luminaire development, assess the evaluative impact of professional observation and quantitative data, benchmark current luminaire types in terms of energy efficiency,

2.  Melanie Taylor, IALD, LEED BD+C; WSP Lighting
Design
 Dan Blitzer, LC; The Practical Lighting Workshop
 Ruth Taylor, IES; Pacific Northwest National
Laboratory

3. Partnerships link energy efficiency & lighting quality

4.  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

6.  Inclusive rather than 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

7.  Approach
 Criteria
 Installations
 Evaluations
 Selecting Winners

8.  Organized by application
 Product Evaluation
 Installed and lighted
 Table top (2nd fixture)
 Documentation
 Process
 Independent judgment
 Preliminary scoring
 Discussion and decision
 Post judging analysis & verification

9. 9

11. • NGL Minimum
efficacy requirements
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

12. www.ngldc.org
Notes from the
judges are key.

14.  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

15. In-person evaluation:
 Color
 Illuminance
 Light distribution
 Glare control
 Serviceability
 Controllability
 Value
 Aesthetic appearance
 Bonus points
Documentation analysis:
• Luminaire Efficacy
• Lumen maintenance

16. Evaluation is based on visual evaluation of the color appearance,
consistency, and rendering of the installed luminaire.

17. Color Rendering versus lighting output
Color Rendering of specific colors
Spectrum of LEDs can be modulated, plant
growth lighting is an example.

18. Color temperature a edge 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

19. Horizontal and/or vertical illuminance for the
application must be appropriate according to
accepted lighting practice.

20. Somewhat related to efficacy but more
subjective
Appropriate for the application
Narrow, dim spot of light may be
exactly appropriate for a bar counter

21. Evaluation based on visual evaluation of the uniformity and
contrast provided by the luminaire.

22. Striations and shadows
Outer beam of light
Sharp cut-off at edge of beam
Appropriate for the application

23. Luminaire brightness is evaluated in
conditions as similar as possible to
the intended application to assess
discomfort glare and contrast.

24. Glare bombs!
Multi-module vs single module
Quality is revealed when looking at
glare control
Does affect light output

25. Entries must demonstrate attention 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.

26. Must be able to 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

27. Purchase price is compared to other traditional
sources for the intended application.

28. Is the move to LED worth the initial cost?
Costs can vary dramatically for very
similar fixtures.
Make sure options chosen match the
application, each option affects cost.

29. Evaluation is based on subjective
evaluation of the aesthetic appearance
and style of the installed luminaire.

30. Quality and construction
Leveraging LED module advantages –
small size, point source, controllable
Appropriate for application

31. Dimmability – color constancy, 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

32. Innovation - taking advantage of the unique LED characteristics
Fixture designed for LEDs
Leverage LED module characteristics
Does not need to be 2’ x 4’

33. LEDS are changing our Industry
Quality has improved quickly
LED efficacy will help us meet ambitious energy goals
More innovation to come

35.  Will it perform 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?

36. General
• Luminaire specification sheet
• 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

37. LED Spec
Sheet
LM-80
Report
ISTMT
Report
TM-21
Calculation

38. 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.

40.  A lot of 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

41. 2014 All
Intents 267 1,644
Judged 153 879
% of intents judged 57% 53%
Awards 61 318
% of judged awarded 40% 36%

43. ALLPRODUCTS:
INDOOR
Year AVG lm/W AVG 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

44. ALLPRODUCTS:
OUTDOOR
Year AVG lm/W AVG 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

45. All Entries

46. AWARDED

47. Outdoor Indoor
All
Awarded

48. Outdoor Indoor
All
Awarded

49. Outdoor Indoor
All
Awarded

50. Lm/W CRI
2014 All BIC/Rec All BIC/Rec
Downlights 71 71 83 82
Troffers 100 96 82 85
Industrial 101 100 81 81

51. 0%
20%
40%
60%
80%
100%
2008 2009 2010 2012 2013 2014
High energy impact categories
• Troffers
• Downlights
• Linear Pendants
Low energy impact categories
• Accent
• Decorative
• Wall
Percent of Entries and Winners

52. 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

54.  Higher efficacy requirements
 Limited categories
 Digital controls
 More in-depth serviceability evaluation
 Main performance criteria stays the same
 Focus on color tuning (indoor) and pedestrian scale
(outdoor)

55.  Push the envelope – higher
efficacy minimums
 Focus on key issues
 Controls
 Serviceability
 Fewer entries for more focused
evaluations
 More realistic installations for
more accurate evaluations

56. LIGHTFAIR International 2015 – DOE SSL Booth
LIGHTFAIR NGL Presentation - Monday May 4, 2-5 pm
Time and Money: Installation and Serviceability of LED
Luminaires