Energy Efficient Street Lights Technology

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Energy Efficient Street Lights Technology
Debbie Bell Municipal Regional Sales
Manager Hubbell Lighting, Inc. Yaser
Abdelsamed Director of Innovation and Technology
Acuity Brands Lighting
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Municipal Influencers
Technology
Lighting Need
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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

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Applicable IES Standards
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area
Streets
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RP-8 Standard
illuminance
luminance
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RP-20 Standard
illuminance
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Calculating Lighting

• E Required Footcandles
• F Total Number of Fixtures
• N Lamps per Fixture
• Lm Lumens per Lamp
• LF Loss Factors
• CU Coefficient of Utilization
• Area Area of Space

Critical factors
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• 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

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Calculation tools
Photometry
Geometry
Lighting Calculation
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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 21 versus 81 in a parking
  lot?
• Generally accepted that 2X luminance variation is
  perception threshold.
• Optimized LED design is 21 luminance uniformity
  for main parking driven by illuminance uniformity

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High Pressure Sodium

• System 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

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Metal Halide

• System 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

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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

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LED Lighting
Reduced maintenance
What changed?
Quality Of Light Design
Advanced Optics
EnvironmentallyFriendly
Reduced Glare Spill Light
Dimmable / Instant On
MARKET DRIVERS
? Improved Efficacy ? System Wattage
Flexible Design/Controllable
Remote Controls
2.5X Improved Life ? Lumen Output
ReducedEnergy
Energy Legislation
InstalledCost
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Jacques Pankove, RCA Labratories Invents first
blue GaN LED
Rubin Braunstein, Radio Corp of America reports
on infrafred emission from GaAs and other
semiconducctors
Henry Round Marconi Labs Semi-conductor
junction produces light
Nick Holonyak, Jr., General Electric creates
first practical visisble spectrum LED. Is dubbed
father of the light emitting diode
Nichia , introduces high brightness white LED
150 LPW at 20mA forward current
Shugi Nakamura, Nchia demonstrates first high
brightness blue LED (InGaN)
Cree Lighting, Raliehg, NC demonstrates
prototype 131 LPW at 20mA
Russian Oleg Losev creates first LED semiconductor
Bob Baird and Gary Pittman, Texas Instruments -
patent first infrared (GaAs) LED
M. George Craford (Holonyak protégé) - creates
first yellow LED, 10X brighter red LED and
red-orange LEDs
Cree Lighting - demonstrates rated at 65 LPW at
20mA
Phillips introduces high power LED capable of
continuous operation at W
1991
1920
1955
2003
2006
1961
1993
1972
1962
2008
1971
1907
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The Technology High
Brightness (HB) LED Light Source

• Benefits
• 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

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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 luminaire efficiency of 77 (22000X.77)/250
16940 or 68 overall LPW
X coefficient of utilization of 35
(22000X.35)/250 7700 or 30 delivered LPW
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Thermal balance
FIXTURE
AMBIENT AIR
radiation (10)
Light (25)
convection (90)
Conduction (75)
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Luminous flux
Junction temperature
Lumen output decreases with temperature.
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Instant On
Lumens / Watt
Thermally Stabilized
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Mean lumens
20C
L70
Life decreases significantly with increasing
temperature.
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LED Droop
IDEAL
actual
As current increases, light output doesnt
increase at the same rate.
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Comparison of Lamp Sources
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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?
Whats 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?
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Total Cost of Ownership
Traditional
LED Solution
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Whats next Lighting Controls
Radio Frequency
Circuit Control
Power Line Carrier
Wireless Telemetry

• Benefits
• Asset management
• Resource allocation
• Customer service
• Warranty assurance
• Remote troubsleshooting
• Issues
• New technology
• Retrofit application
• Data retrieval and managment
• High initial costs

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Whats 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

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Whats next Solar / Wind

• Issues
• Location
• Energy storage
• Low wattages
• Higher EPA
• Power supplier?

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Checklist for Preparation

• 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.

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Questions?
Debbie Bell Municipal Regional Sales
Manager Hubbell Lighting, Inc. E
dbell_at_hubbell-ltg.com C 864-293-8717 Yaser
Abdelsamed Director of Innovation and Technology
Acuity Brands Lighting E yaser.abdelsamed_at_acuity
brands.com W 740-587-6003