1. Exterior LED Area Lights
Christian Douglass
Regional Technical Forum
February 17, 2016

2. Objective
Today, we are seeking a decision to adopt updates to the exterior LED area lights UES measure
updates to the measure specification
updates to baseline assumptions and energy savings
updates to costs and lifetimes of LED products

3. Measure Overview Market Sector: Any Baseline Type: Current Practice
Estimation Method: Unit Energy Savings (UES)
Current Category: Proven
Current Status: Active
Current Sunset Date: February 29, 2016
Reason for Review: Measure sunsets this month
Subcommittee Review: No

4. Background

5. Example of a Typical Area Light
Photocell controlled
Pole or wall mounted
Also called:
“barn lights”,
“dusk-til-dawn lights”

6. Examples of LED Area Light Products
LED screw-in lamp
LED fixture

7. Some History
Measure brought forth by Small and Rural Subcommittee in January of 2014
Much of measure details are informed by interviews conducted with regional utility personnel in 2011 and 2013
At January 2014 meeting, RTF sent measure back to staff to address a few comments and concerns, such as
Including measure applications for both LED lamps and fixtures
Making street lights ineligible for measure
In February of 2014, RTF adopted measure as Proven
For more detailed history, see January 2014 and February 2014 RTF meeting minutes

8. Current Measure Specification
Implementation and product standards:
“Installation of an LED lamp or fixture replacing an exterior, photocell-controlled HID lamp or fixture”
Qualifying lamp and fixture replacements must be listed on an appropriate Qualified Products List (QPL) as outlined in the measure workbook
Qualifying measures may not be used for street or roadway lighting purposes as defined in the workbook
Fixtures subject to stricter standards dictated by code or city ordinance also do not qualify

9. Current Measure Spec (continued)
Measure identifiers:
As found lamp wattage and technology
100W High Intensity Discharge (HID)1
150W HID
175W Mercury Vapor (MV)
200W HID
LED wattage
25-34W
35-44W
45-54W
Replacement type
Lamp (with or without a new photocell2)
Fixture
Example measure application: “45-54W LED lamp & new photocell replacing 150W HID lamp”
1 Includes metal halide and high pressure sodium
2 Some programs interested in requiring photocell replacement for greater O&M cost savings

10. How We Calculate the Current Unit Energy Savings (UES)

11. Important Assumptions
Baseline is current practice
2011/2013 interview responses indicated replacement on burn-out (“when the customer calls”)
Delivery verification guidance adopted in 2015 for this measure incorrectly listed baseline as pre-conditions
Current baseline assumption is that nearly all replacement is “like-for-like” and there is no baseline LED penetration
E.g. HID fixtures will be replaced with 100% HID fixtures
One caveat to this rule is MV which uses an HID current practice baseline (based on interviews)
Operating hours are assumed to be 4,380 hours per year (12 hrs per day, 365 days/yr) since photocell operation is required
Most fixtures owned by utility; some are owned privately

12. Current Savings Calculation: an Example
As found fixture: 150W HID (input power: 178W)
Equivalent LED fixture1: 50W LED
Current Practice Baseline:
178W * 100% + 50W * 0% = 178W
Savings Calculation:
(178W – 50W) * 4,380 hrs / 1,000 = 560 kWh
LED market share assumed to be “less than 1%”
1 Based on utility interviews of what is happening “in the field” and manufacturer suggestions

13. Proposed Updates

14. List of Proposed Updates
Measure specification
Baseline assumptions
Measure costs
Measure life

15. List of Proposed Updates
Measure specification
Baseline assumptions
Measure costs
Measure life

16. Proposed Updates to Measure Spec
Two proposed updates to the measure specification:
Update requirement that qualifying lamps and fixtures can either be listed on specific Qualified Product Lists OR meet minimum technical requirements for efficacy and lumen maintenance (shown on next slide)
Technical requirements taken from v3.1 of DesignLights Consortium (DLC) specification1
Remove measure identifier for “as found” lamp type and wattage
Would allow measure to apply where there is no existing fixture
More consistent with current practice definition
More on how this impacts savings calculation in a few slides 1

17. Proposed Measure Specification
Implementation and product standards:
Installation of a photocell-controlled LED lamp or fixture
Qualifying lamp and fixture replacements must be listed on the Lighting Design Lab Qualified Products List, the Design Lights Consortium Qualified Products List (v3.1), OR has the following technical specifications:
Lamp or fixture with 250-4,999 lumens of light output has minimum efficacy of 65 l/W
Lamp or fixture with 5,000-9,999 lumens of light output has minimum efficacy of 70 l/W
Lamp or fixture with 10,000 or greater lumens of light output has minimum efficacy of 75 l/W
Lamp or fixture has L70 rating greater than or equal to 50,000 hrs
Qualifying measures may not be used for street or roadway lighting purposes as defined in the workbook
Measure identifiers:
Lamp or fixture LED wattage
20-29W
30-44W
45-59W
60-74W
Replacement type
Lamp (with or without a new photocell), fixture
Minor changes to LED wattage categories to align with equivalent HID fixtures

18. List of Proposed Updates
Measure specification
Baseline assumptions
Measure costs
Measure life

19. Baseline Assumption: HIDs
If we remove the “as found” wattage measure identifier, we need an estimate of the equivalent HID wattage for the HID portion of the current practice baseline
We can establish an HID equivalent wattage for various LED wattages using several sources:
2011/2013 interviews of regional utility personnel
Subject matter expert judgment from draft 7th Plan analysis1
Established tables showing LED and HID fixtures with equivalence in “visually effective lumens”2
Manufacturer suggestions
Using the sources above, the CAT developed the following table and proposes it be used to inform the HID portion of the current practice baseline
LED Lamp or Fixture Watts
"Equivalent" HID Lamp Watts
"Equivalent" HID Fixture Input Watts
20-29 70 91
30-44
100
129
45-59
150
185
60-74
200
240
1 Discussions with Evergreen Consulting on HID to LED wattage reductions observed in practice. 2

20. Baseline Assumption: LEDs
Current measure assumes 0% penetration of LEDs in the current practice baseline
Based on utility interview responses back in 2013
DOE national sales data and sales forecasts suggest that current LED sales penetration is non-zero and increasing rapidly
Source: U.S. DOE, "Energy Savings Forecast of Solid-State Lighting in General Illumination Applications", prepared by Navigant Consulting, August 2014.

21. Baseline Assumption: LEDs (continued)
CAT used DOE sales forecast curve to estimate sales market share for 2016
DOE sales forecast curve suggests 2016 LED penetration of about 25%, which the CAT proposes to use
Note the following caveats about the DOE data:
It is not specific to the Northwest region
It is not specific to area lights – it includes building façade lighting (wall packs) and pathway lighting (it does not include street or parking lights)
RTF judgment required x

22. Proposed Savings Calculation: an Example
LED fixture: 52.5W LED
“Equivalent HID Fixture”: 150W HPS (input power: 185W)
Current Practice Baseline:
185W * 75% W * 25% = 152.5W
Savings Calculation:
(152.5W – 52.5W) * 4,380 hrs / 1,000 = 438 kWh
Estimated market share of HID
Estimated market share of LED

23. List of Proposed Updates
Measure specification
Baseline assumptions
Measure costs
Measure life

24. Measure Costs
When measure was developed in 2014, only a few qualifying products available in the market
Total cost of LED lamp or fixture at that time: $200 to $250
In the last two years, costs have dropped significantly
CAT collected updated cost data from retail sites and proposes using the new cost curves shown below

25. Measure Costs (continued)
CAT also proposes a change in the way incremental costs are computed for fixtures
Current measure uses LED fixture costs incremental to an HID lamp
CAT proposes to use LED fixture cost incremental to current practice fixture cost (and LED lamp cost incremental to current practice lamp cost)
Example:
Current Incremental Cost Calculation for Fixtures
Efficient Fixture Cost – Base Case Lamp Cost = Incremental Cost
$ – $ = $232
Proposed Incremental Cost Calculation for Fixtures
Efficient Fixture Cost – Base Case Fixture Cost = Incremental Cost
$ – $ = $41

26. List of Proposed Updates
Measure specification
Baseline assumptions
Measure costs
Measure life

27. Measure Lifetime
Current measure uses the same lifetime assumption for both lamp and fixture products (70,000 hrs or about 16 yrs1)
Not enough products available at the time to see a significant difference in lifetime
From the products now available in the market, there appears to be shorter rated lifetimes for lamps as compared to fixtures
Lamps predominantly rated at 50,000 hrs (or 11 yrs)
Fixtures rated at about 75,000 hrs on average (or 17 yrs)
CAT proposes using different lifetimes for fixtures and lamps – 17 yrs and 11 yrs, respectively
1 Assumes 12 hrs per day or 4,380 annual hours of operation

28. Proposed Savings, Lifetime, Incremental Cost, & Regional Cost-Effectiveness

29. Energy Savings

30. Measure Life

31. Incremental Cost

32. Regional Cost-Effectiveness

33. Proposed Delivery Verification Guidance
Check installation is either an LED lamp or an LED fixture
Check LED wattage
Check that lamp or fixture is photocell-controlled
Check lamp or fixture is listed on the Lighting Design Lab Qualified Products List, the Design Lights Consortium Qualified Products List (v3.1), OR has the following technical specifications:
Minimum efficacy of 65 l/W for lamps or fixtures with 250-4,999 lumens of light output
Minimum efficacy of 70 l/W for lamps or fixtures with 5,000-9,999 lumens of light output
Minimum efficacy of 75 l/W for lamps or fixtures with 10,000 or greater lumens of light output
L70 rating of 50,000 hrs or greater for all lamps and fixtures
Check that fixture is not used for lighting of a street or roadway

34. Proposed Motions
“For the exterior LED area lights UES measure, I move the RTF:
accept the measure updates as proposed, including updates to the measure specification, baseline, energy savings, costs, and lifetime;
keep the Category for all measure applications at Proven;
keep the Status at Active; and
change the Sunset Date to 2/28/2017.”