Energy Efficient Street Lights Technology

83 years of excellence

The Association of Electrical and Medical Imaging Equipment Manufacturers

Energy Efficient Street Lights Technology

Debbie BellMunicipal Regional Sales Manager

Hubbell Lighting, Inc.

Yaser AbdelsamedDirector of Innovation and Technology

Acuity Brands Lighting



Municipal Influencers

LightingProvider

BudgetConstraints

Legislation

Technology

CommunityPressure

TechnologyTechnologyLightingLightingNeedNeed



Industry Organizations and Standards

Illuminating Engineering Society - www.ies.org

American National Standards Institute – www.ansi.org

RP-8-00 – Roadway Lighting RP-33-99 - Lighting for Exterior Environments RP-6-01 - Sports and Recreational Area Lighting DG-4-03 – Roadway Lighting Maintenance LM-79,LM-80 – LED Photometry and Measurement C136.3-1995 - Roadway Lighting Equipment



Applicable IES Standards



Streets

area



illuminance

luminance

RP-8 Standard



RP-20 Standardilluminance



E = Required Footcandles F = Total Number of FixturesN = Lamps per FixtureLm = Lumens per LampLF = Loss FactorsCU = Coefficient of UtilizationArea = Area of Space

F x N x Lm x LF x CU

AreaE =

Criticalfactors

Calculating Lighting



• Recoverable• Light that can be recovered through lamp changes or

properly planned maintenance.• LLD: Lamp Lumen Depreciation• LDD: Luminaire Dirt Depreciation• LBO: Luminaire Burn-Out factor

• Unrecoverable• Factors that are inherent to the design of the fixture or

the characteristics of the space.• LAT: Luminaire Ambient Temperature• LSD: Luminaire Surface Depreciation

• IESNA Lighting Handbook, 9th Edition, pg 9-17• RP-8-00 - Annex A



Calculation toolsPhotometry

Geometry

Lighting Calculation



Uniformity major benefit•IESNA recommended practice encourages better uniformity (lower Max-to-Min) since it is easier for the eye to adapt

•Limited research data available; for example … How much better is 2:1 versus 8:1 in a parking lot?

•Generally accepted that 2X luminance variation is perception threshold.

•Optimized LED design is ~2:1 luminance uniformity for main parking driven by illuminance uniformity



High Pressure SodiumSystem Description Standard lamp and socket Electronic ballast

Benefits Established lamp technology Long life Step dimming Prevents “end of lamp life” syndrome that can damage the fixture Remote monitoring and troubleshooting Asset management Retrofit into existing opticals

Issues Poor color rendering N/A in 480V Lamp warranties Controls backhaul expense



Metal HalideSystem Description Ceramic arc tube lamp Electronic ballast Special socket

Benefits Extended lamp life White light and higher CRI Variable or step dimming Higher source efficacy and lumen maintenance Faster hot restrike Retrofit into existing opticals Meets EISA legislation

Issues New technology Manufacturers dependent Limited wattage



Induction Technology

System Description Matched lamp, socket and ballast

Benefits Instant on White light and similar CRI Extended lamp life/ lower maintenance costs Recent advancements provide variable or step dimming Good source efficacy and lumen maintenance

Issues Diminished optical control Limited wattage Thermal management High initial costs



What changed?

Improved Efficacy System Wattage

Advanced Optics

Reduced Glare & Spill Light

Dimmable / Instant On

2.5X Improved Life Lumen Output

LED Lighting

ReducedEnergy

Reduced maintenance

Quality Of Light Design

EnvironmentallyFriendly

Flexible Design/Controllable

MARKET DRIVERS

EnergyLegislation

InstalledCost

RemoteControls



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IncandescentHalogen

HID

LED Cool White - 5800K

LED Efficiency Evolution

CFL

Fluorescent

LED Warm White - 3000K



The Technology… High Brightness (HB) LED Light SourceBenefits Efficiency Optical advantage Environmentally friendly Life and TCO Lumen Maintenance Durable, Compact Color, Color Changing Instant on Variable Dimming Operates well in cold temperatures Improved photometrics



LED Features & Benefits

LED Features: Multiple Light Source Emitter Directional Light Source vs. 360 deg. Lamp Individually Controllable

LED Benefit: Color Consistency – Unit To Unit Greater Optical Control – Light where desired Improved Fixture Efficiency – Fewer Fixtures / Lower Watts Improved Control Of Spill Light – Less Light Pollution / Light

Trespass

Coefficient of Utilization

Sanity check: 250W MH Lamp = 22000 PS lumens initial (13700 mean) = 22000/250 = 88 LPW

X coefficient of utilization of 35% = (22000X.35)/250 = 7700 or 30 delivered LPW

X luminaire efficiency of 77% = (22000X.77)/250 = 16940 or 68 overall LPW



FIXTURE

Conduction (~75%)

AMBIENT AIR

convection (~90%)

radiation (~10%)

Thermal balance

Light (~25%)



Lumen output decreases with temperature.

Junction temperature

Lu

min

ou

s fl

ux



0

10

20

30

40

50

60

70

80

90

100

2000 2001 2002 2003 2004 2005 2006 2007 2008

Lu

men

s /

Watt

Instant On

Thermally Stabilized



L70

Mean lumens

20C

Life decreases significantly with increasing temperature.



LED “Droop”

As current increases, light output doesn’t increase at the same rate.

IDEAL

actual



Comparison of Lamp Sources



0

200

400

600

800

1000

1200

1400

LEDCFL

Incandescent

FluorescentHID

Lu

men

s p

er

$



LED Lighting Checklist

Who is your LED supplier?

Did they provide an IESNA LM-80 test report for the LEDs?

What is the max operating temp and max Tj?

What’s the expected L70 fixture lifetime?

Can you supply an IESNA LM-79 test report? .ies files?

What are the delivered lumens and LPW of the fixture?

Is the chromaticity in the ANSI C78.377A color space and is it stable over time?

How much does the color vary from fixture to fixture?

What is the Power Factor of your fixture?

Have you applied for DOE Energy Star? Why/why not?

Is your fixture RoHS compliant? Mercury free?

What is your warranty on the entire fixture, not just LED light engine?



Total Cost of OwnershipTraditional

LED Offering

Energy

Material

Maintenance

Energy

Maintenance

Material

SavingsSavings

Labor

Labor

LED Solution



What’s next… Lighting Controls

Benefits Asset management Resource allocation Customer service Warranty assurance Remote troubsleshooting

Issues New technology Retrofit application Data retrieval and managment High initial costs

Power Line CarrierRadio FrequencyCircuit Control

Wireless Telemetry



What’s next… Plasma Lighting

Benefits Energy Efficient Minimized environmental

material impact Full color spectrum Dimmable Higher lumen packages Smaller point source “LED on steroids”

Issues Technology in development Retrofit or new installation High initial costs Backhaul services



What’s next… Solar / Wind

Issues Location Energy storage Low wattages Higher EPA Power supplier?



Have you baselined your current lighting system? Do you have influence over lighting selection? Do you know what you are spending on lighting? What are your TOTAL maintenance costs? Does your lighting specification consider new technologies? Will your infrastructure support new technology? Have you researched energy rebate programs? Communicate with your peers. Take advantage of manufacturer education. Attend regional meetings to gain information. Connect with Industry Standards organizations NEMA, IES, ANSI, APWA, etc.

Checklist for Preparation



Questions?

Debbie BellMunicipal Regional Sales Manager

Hubbell Lighting, Inc.E: [email protected]

C: 864-293-8717

Yaser AbdelsamedDirector of Innovation and Technology

Acuity Brands LightingE: [email protected]

W: 740-587-6003

Date post:	06-Feb-2016
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Energy Efficient Street Lights Technology

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