Pole-Mounted Lights (Barn Lights)Proven UES Measure Proposal

Regional Technical ForumFebruary 19, 2014

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Today’s Agenda

• Measure Overview and Recap• Staff Highlighted Areas• Discuss Outstanding Issues• UES Workbook

– Measure Descriptions– Measure Analysis and Input Details– Savings, Cost, and Cost Effectiveness

• RTF Staff Recommendation• Proposed Decision

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Measure Overview

• Recap: what is a “barn light?”

Photo from www.frostelectric.com.

Pole- or wall-mounted

Photocell-controlled

Commonly ”acorn”-style

fixtures

Typically use 100-200W HID lamps (base case)Often owned and

maintained by utilities

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Background• This measure has been brought to the full RTF by the

RTF’s Small and Rural Subcommittee.• Subcommittee members identified this measure

amongst many possible options as one that will help serve the needs of their utilities and service territories.

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Background (continued)• Measure was presented by PECI at the last RTF meeting • RTF asked PECI and staff to follow up on a number of

issues related to the measure:– Grounding costs – Are we missing the cost of running a

ground wire if existing HID fixtures do not already have one?

– Photocell life – If the average life of an existing photocell is less than the average life of the replacement lamp, can we still claim O&M savings?

– Whole fixture replacements – Should we add a fixture replacement measure in addition to the lamp-only replacement?

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Background (continued)– Refinement of measure specification – Can we limit the

measure’s installation to non-street lighting applications?– Remote-ballasted induction lamps on wooden poles – If

remote-ballasted systems cannot be used on wooden poles, is this a measure application that we want?

– Voiding of fixture UL-listing – Can a fixture’s UL listing be voided in the case of an HID to LED lamp-only replacement?

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Staff Highlighted Areas• Goal today is to resolve all outstanding issues raised

by the RTF:1. Grounding costs2. Whole fixture replacements3. Refinement of measure specification4. Remote-ballasted applications5. Voiding of fixture UL-listing6. Photocell life

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Outstanding Issues• Grounding costs

– PECI asked Ravalli Electric if they would incur additional grounding costs if they replaced an HID lamp with an LED lamp on a wooden pole. Ravalli said they would not, as grounding of these poles is already standard practice.

– Staff reached out to lighting specialist at Tacoma Power who also confirmed that grounding of all wooden poles is standard practice (though he pointed out that 100% compliance is not likely)

– In addition, staff reached out to a senior Avista engineer who indicated that:

• utility-owned poles would not require additional grounding costs, due to the requirements (NESC) they work under

• customer-owned poles may or may not require additional grounding costs, depending on the situation, under NEC requirements

– Since the vast majority of lights are utility-owned, staff recommends the average case assumption that no grounding costs are incurred.

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Outstanding Issues• Whole fixture replacements

– Staff researched the costs of LED fixture replacements, which appear to be comparable to lamp-only replacements.

– Most replacement fixtures do not come with a photocell, so the cost of an electronic photocell (~$30) is included.

– Staff recommends the addition of whole LED fixture applications to the measure list.Measure Case Lamp/Fixture

Cost (2013$)Photocell Cost

(2013$)Total Measure Cost (2013$)

50W LED lamp 250 0 250

40W LED fixture 250 30 280

30W LED fixture 200 30 230

See workbook for cost sources.

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Outstanding Issues (continued)• Refinement of measure specification

– Staff has researched how the measure specification can be amended to disallow the installation of the measure in street-lighting applications.

– The Illuminating Engineering Society (IES) provides language which differentiates street and roadway lighting from general area lighting by defining street/roadway lighting as “Lighting within public right-of-way or easement for the principal purpose of illuminating streets or roads.”

– Staff recommends adopting the IES language into the measure specification to define which fixtures are eligible under the specification and which are not.

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Outstanding Issues (continued)• Remote-ballasted induction

– Since many or most barn light poles are wood, this measure permutation may not be well-suited for this application.

– The addition of LED fixtures to the measure specification appears to be more valuable than trying to figure out how to keep this measure permutation in the mix.

– Therefore, staff recommends removing remote-ballasted induction lamps from the measure list.

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Outstanding Issues (continued)• Voiding of fixture UL-listing

– PECI did not find evidence of a fixture’s UL-listing being voided for lamp replacements of this particular application.

– Staff looked at existing lighting programs that offer lamp-only LED replacements for this application (e.g. BPA Lighting Program), and there is no mention of this issue.

– Staff recommends no further RTF action on this issue.

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Outstanding Issues (continued)• Photocell life

– Staff agrees that existing photocells could fail well before the lamp if a lamp-only replacement is done without a photocell replacement.

– Staff sees two options in regard to the issue:• Require electronic photocell replacement – would provide

maximum O&M savings, but may be overly prescriptive• Do not require photocell replacement – lower O&M savings, but

allows programs to be more flexible in their operation

Measure Case* Savings (kWh)

Measure Cost

(2013$)

Estimated Photocell Life (yrs)

Estimated Lamp Life

(yrs)

Total Periodic O&M Savings

(2013$)

50W lamp w/ new photocell

548 280 15 16 41.71

50W lamp w/ NO new photocell

548 250 5 16 13.87

*Assumes baseline lamp is 150W HID

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Outstanding Issues (continued)– Staff recommends the second option, to perform a lamp-only

replacement and leave photocell replacement up to programs.

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Measure Descriptions

• Go to the following sections in the Summary tab in the proposed measure workbook:– Measure Properties– Measure Identifiers

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Measure Analysis and Inputs Details

• Go to the following sections in the Summary tab in the proposed measure workbook:– Constant Parameters– Energy Savings Estimation Method, Parameters

and Data Sources– Measure Incremental Costs and Benefits– Measure Lifetime

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Savings, Cost, & Cost Effectiveness

• Go to the following sections in the Presentation tab in the proposed measure workbook:– Measure savings– Measure costs– Measure TRC B/C ratios

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RTF Staff Recommendation• Approve the Pole-Mounted Light (Barn Light) UES as “Proven”

– Include LED fixtures in addition to lamp replacements– Include IES language to identify qualifying fixtures– Remove remote-ballasted induction lamps from measure– Provide no additional guidance on fixture UL issues– Do not require photocell replacement w/ lamp replacement– Assume no grounding costs in the average case

• Set the measure status to “Active”• Set the sunset date to February 29, 2016

– A two-year sunset period is proposed instead of a longer (e.g. five-year) period due to the rapidly-changing nature of LED costs and products

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Proposed Decision“I _______________ move that the RTF:• Approve the Pole-Mounted Light (Barn Light) measure as a

“Proven” UES;– [Include / Do not include] LED fixtures in addition to lamp replacements– [Include / Do not include] IES language to identify qualifying fixtures– [Remove / Do not remove] remote-ballasted induction lamps from

measure– [Provide additional guidance / Provide no additional guidance] on fixture

UL issues– [Require / Do not require] photocell replacement with lamp-only

replacement– Assume [grounding costs / no grounding costs] in the average case

• Set the measure status to ‘Active;’ and• Set the sunset date to February 29, 2016.”

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Additional Slides

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Subject Matter Expert (SME) Interviews

• SME’s interviewed in 2013:Individual Utility Region

Erin Hope* BPA E Washington

Dick Stroh* BPA Idaho

David Bopp Flathead Electric NW Montana

Jim Maunder Ravalli Electric W Montana

Vic Hubbard Franklin PUD S Washington

John Wilson BPA All BPA territory

Virginia Harman Glacier Electric NW Montana

Michael Lane Puget Sound Energy NW Washington

Mariah Schrotzberger Energy Trust of Oregon Oregon (IOU territories)

Steve Schauer Oregon Trail Electric Coop E Oregon

* SME was also interviewed as part of 2011 Barn Lights study conducted by BPA.

SME Interview Findings• Majority of utility-owned barn lights are high pressure sodium,

with smaller numbers of mercury vapor and metal halide lamps in service.

• SMEs did not put a quantitative estimate on the percent distribution between the lamp types; instead, many SMEs said “most” lamps are HPS.

• SMEs reported existing HID lamps with wattages of 100 - 1000W, with the majority of the lamps on the lower end of the spectrum (100-250W).

• Two utilities interviewed reported that they were replacing some HID barn lights with induction or LEDs– Oregon Trail Electric Coop and Ravalli are replacing 100W HPS

lamps with 50W LEDs on a replace-on-burnout basis, and leveraging BPA Lighting Calculator incentive.

SME Interview Findings (continued)• All SMEs reported that utility-owned barn lights are

photocell-controlled.• There are currently no LED lamp replacements

available for replacement of 200W+ HIDs; the measure base case options are therefore limited to 100-175W HID lamps.

• Two SMEs reported already existing deemed incentive offerings for HID to LED retrofits.– SMEs mentioned they thought the creation of an RTF barn

light measure would create confusion with the existing incentive offerings, and they would prefer an RTF barn lights measure was not created.

SME Interview Findings (continued)• ‘Current Practice’ of barn light lamp replacement

– 100, 150, and 200W HID lamps• Replaced with similar 100, 150, and 200W HID lamps

on burnout• Some pilot projects replacing HID with LED, but not

enough for a Current Practice baseline adjustment– 175W Metal Halide (MH) lamps

• Replaced with similar 175W MH bulbs on burnout– 175W Mercury Vapor (MV) lamps

• Commonly replaced with 100W HPS lamps on burnout• For this reason, ‘Current Practice’ for a 175W MV lamp

assumed to be a 100W HPS lamp

Other Findings• There is only one LED lamp on the market (the

Evluma® 50W Clearlight Beacon LED) that is a suitable replacement for HID barn lights up to 175W.– The Evluma LED is not ENERY STAR® or DLC®-approved but

has been reviewed and approved for incentives by BPA. • Self-ballasted inductions lamps were specified in

2011 analysis; however, there are currently no UL-listed self-ballasted induction lamps available. – Self-ballasted induction lamps were replaced with remote-

ballasted induction lamps in ProCost analysis