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

2. Municipal Influencers
Technology
Lighting
Need

3. Industry Organizations and Standards
Illuminating Engineering Society -
American National Standards Institute –
RP-8-00 – Roadway Lighting
RP Lighting for Exterior Environments
RP Sports and Recreational Area Lighting
DG-4-03 – Roadway Lighting Maintenance
LM-79,LM-80 – LED Photometry and Measurement
C Roadway Lighting Equipment

4. Applicable IES Standards

5. area
Streets

6. RP-8 Standard
illuminance
luminance

7. RP-20 Standard
illuminance

8. E = Calculating Lighting Lm = Lumens per Lamp LF = Loss Factors
F x N x Lm x LF x CU
Area
E =
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

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

10. Calculation tools
Photometry
Geometry
Lighting Calculation

11. 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

12. High Pressure Sodium System Description Benefits Issues
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

13. Metal Halide System Description Benefits Issues 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

14. Induction Technology System Description Benefits Issues
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

15. LED Lighting What changed? Reduced maintenance Quality Of Light Design
Advanced Optics
Environmentally Friendly
Reduced Glare & Spill Light
Dimmable / Instant On
MARKET DRIVERS
 Improved Efficacy  System Wattage
Flexible Design/ Controllable
Remote
Controls
2.5X Improved Life  Lumen Output
Reduced Energy
Energy
Legislation
Installed Cost

16. LED Efficiency Evolution
Jacques Pankove, RCA Labratories –
Invents first blue GaN LED
Henry Round – Marconi Labs Semi-conductor junction produces light
Rubin Braunstein, Radio Corp of America – reports on infrafred emission from GaAs
and other semiconducctors
Russian Oleg Losev creates first LED semiconductor
Nick Holonyak, Jr., General Electric creates first practical visisble spectrum LED. Is dubbed “father of the light emitting diode”
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
Shugi Nakamura, Nchia – demonstrates first high brightness blue LED (InGaN)
Cree Lighting, Raliehg, NC – demonstrates prototype 131 LPW at 20mA
Nichia –, introduces high brightness white LED 150 LPW at 20mA forward current
Phillips introduces high power LED capable of continuous operation at W
Cree Lighting - demonstrates rated at 65 LPW at 20mA
1907
1920
1955
1961
1962
1971
1972
1991
1993
2003
2006
2008
Incandescent
Halogen
HID
LED Cool White K
LED Efficiency Evolution
CFL
Fluorescent
LED Warm White K

17. 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

18. LED Features & Benefits
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 = PS lumens initial (13700 mean) = 22000/250 = 88 LPW
X luminaire efficiency of 77% = (22000X.77)/250 = or 68 overall LPW
X coefficient of utilization of 35% = (22000X.35)/250 = 7700 or 30 delivered LPW

19. Thermal balance FIXTURE AMBIENT AIR radiation (~10%) Light (~25%)
convection (~90%)
Conduction (~75%)

20. Lumen output decreases with temperature.
Luminous flux
Junction temperature
Lumen output decreases with temperature.

21. Instant On
Lumens / Watt
Graph
Thermally Stabilized

22. Life decreases significantly with increasing temperature.
Mean lumens
20C
L70
Life decreases significantly with increasing temperature.

23. As current increases, light output doesn’t increase at the same rate.
LED “Droop”
IDEAL
actual
As current increases, light output doesn’t increase at the same rate.

24. Comparison of Lamp Sources

25. LED
CFL
Incandescent
Fluorescent
HID
Lumens per $

26. 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?

27. Total Cost of Ownership
Traditional
LED Offering
Energy
Material
Maintenance
Savings
Labor
LED Solution

28. What’s next… Lighting Controls
Circuit Control
Radio Frequency
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

29. 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

30. What’s next… Solar / Wind
Issues
Location
Energy storage
Low wattages
Higher EPA
Power supplier?

31. 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.

32. Questions? Debbie Bell Municipal Regional Sales Manager
Hubbell Lighting, Inc. E: C:
Yaser Abdelsamed
Director of Innovation and Technology
Acuity Brands Lighting E: W: