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Efficiency Vermont is a Registered Provider with The American Institute of Architects Continuing Education Systems. Creditearned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-AIA members are available on request.

Better Buildings By Design 2010

This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.

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Learning Objectives

Deep Lighting Retrofits and Relighting• At the end of this program, participants will be able to:

• Achieve greater cost savings in Deep Lighting Retrofits by moving beyond the simple one-for-one standard replacement practice, to a customized process of intelligent retrofit and relighting application.

• Utilize case studies of CAD-based lighting design analysis to significantly increase initial installation and overall energy cost savings.

• Discuss how process variations affect bidding lighting retrofit projects for building owners, contractors, and electrical suppliers.

• Explore the quantifiable and less quantifiable benefits for re-lighting, rather than retrofitting for several types of lighting projects. .

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Retrofit vs. Relighting

Similarities• Evaluate potential changes

to light levels

• Evaluate existing lighting system

• Replace lamp/ballast technology, diffusers, etc where applicable

• Add or modify lighting controls

Relighting Differences• Luminaire replacement

• Potential modification of luminaire locations

• Consider changes to room reflectance

• Model with CAD based lighting software

• Similar to renovation and commercial fit-up

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Why Relighting?

What option best meets owner’s need

• Greater Energy Savings & Options

• Lighting Quality – performance related

• Image Upgrade

• Best Return on Investment

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Examples: Gardeners Supply

Motivation

• Energy cost savings

• Kilawatt Partners- ESCO suggestion

• Green Image

• Light improvement- reduce LLF

120,000 sf Distribution Center/Warehouse

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Gardeners Supply

Investment ValuePrevious electric use $80,000/yr

Post retrofit electric use (monitored) $40,500/yr

Design and Analysis Investment

(paid over 1 yr) $20,000 +/-

Fixture Cost $42,000

Installation Cost $15,000

EVT Investment $15,000 +/-

EPACT Tax Credit $72,000 (up to $0.60.sf)

ProcessInvestment of time and $ for

evaluation and redesign

CAD Based modeling included sample of each area

Existing Ceiling outlets dictate luminaires location (up to 8’)

Detailed luminaire schedule incl. cord and plug and occ sensors

Owner direct purchased luminaires

Contracted for installation, difficult access issues

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Gardeners Supply

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Example: South Main Auto

Motivation:

• Energy cost savings

• Electrical contractor- recommendation

• USDA Rural Development Grant

• Improve light in service bays

5,080 sf Auto/Truck Repair Shop

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South Main Auto

Investment ValueAudit and Redesign Cost <$1,800

Previous annual electric use 63,300 kwh

Post retrofit 32,020 kwh

Due to CVPS rate structure, cost savings were not proportional

Previous annual cost $10,545/yr

Post retrofit cost $6,230/yr

EVT Investment $1,800

USDA-RDev Grant $4,044

ProcessElectrical contractor was efficiency

program savvy

USDA Grant requires independent evaluation and recommendation

Existing lighting not task oriented

Redesign needed for correct light placement

CAD-based light modeling showed effect of cars on lifts

Contractor purchased and installed, owner financed $10,000 +/-

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South Main Auto

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CAD Based lighting simulation, used to evaluate illuminance when simple mathematical models are inadequate. Here, lighting is needed under vehicles, as well as for work bench and general circulation.

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Example: Vermont Precision Tool

Motivation:

Lighting Quality for Manufacturing

Existing 1000w MH system not coord. w/ HVAC locations

Energy Cost Savings

14,100 sf machine shop

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Vermont Precision Tool

Investment Value:Audit/Redesign Options $1,600

Annual Electric Use 155,520 kwh

Options included reductions in electrical usage from:

20% for retrofit lamp/ballasts + new fixtures

26% for all new MH luminaires

62% for all new fluorescent low bay

Process:Current lighting was inadequate

Mfr reps suggestions confused owners, who contracted for independent recommendation

Additional lighting locations needed, installation costs common to all solutions

CAD-based modeling needed to include HVAC obstructions

Most costly option was best overall for quality and efficiency

Owners able in invest in upgrade

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Example:Photogarden Retail Store

Motivation:Poor lighting quality in other

locations

Other retailers recommended independent lighting consultant

Looking for excellent light as well as aesthetic qualities

2000 sf retail store and workshop fit-up

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Photogarden Retail Store

Investment Value:Redesign cost $1600, no modeling

Store fixture layout indicated 75w halogen track lighting @ 3.0w/sf

Redesign with MH track technology brought this down to 1.0 w/sf +/-

Less track needed, and 50% fewer track heads needed, which kept costs down

EVT Incentive of $75 per track head reduced incremental cost to $0.

Process:Owners worked directly with lighting

designer –most efficient communication wise

Electrician involvement would have improved process

Site visit essential, high ceiling allowed most efficient layout

Mfr layout did not account for field conditions, daylighting, controls

Electrical contractor not aware of VT Energy Code requirements

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Retail Store Modeling

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Donna Leban, Light/Space/DesignSouth Burlington, VT 05403 802-862-1901

www.lightspacedesign.biz

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Look for “Lighting Retrofit and Relighting – A Guide for Energy Efficiency”, from Wiley Publishing, by Jim Benya and Donna LebanTo be out later this year.