LED Lighting: Efficiencies in
Energy and Maintenance
August 21, 2013
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Upcoming Training
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Aug 22
Aug 27
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Aug 29
* Free to PSAB members
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Upcoming Classroom Training
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Municipal Officials Training & Update
The Course in Zoning Administration
Basic Municipal Budgeting
Confined Space Training
PSAB’s Fall Leadership Conference
Oct. 18 – 20
Pittsburgh, Pa.
www.boroughs.org/
Finding the “Best Solution” for Your Environment
Agenda
Who we are/What we Do
LED Background
LED vs Traditional Lighting
Evaluating LED Solutions
Benefits of LED Lighting
Funding Methods
Performance Contracting
Connect with us!
Who We Are / What We do
Provide
Multiple LED
Products
Numerous Manufactures
Not a distributor
offering only one
product line
Provide
Total
Turnkey
Installation
Services
Lighting Retrofits
New Installation
Energy Efficient Lighting Solutions Include:
Energy Efficient Lighting Products
Lighting audits / analysis
Lighting Layouts
Lighting Controls
Turn-key lighting retrofits/replacements
Where We Do it…
•Hatfield Township
•Jenkintown Borough
•East Norrinton Township
•Whitpain Township
•Richland Township
•Milford Township
•Upper Southampton Township
•Morrisville Borough
•New Britain Township
•Nockamixon Township
•Richlandtown Boro
•Edgmont Township
•Thornbury Township
•Chadds Ford Township
•Bethel Township
•Aston Township
•Manor Township
•Falls Township
•Upper Chichester Township
•Lower Chichester Township
•Marcus Hook Borough
•Chester Heights Township
•Ridley Township
•Folcroft Borough
•Darby Borough
•Swarthmore Borough
•Rutledge Borough
•Collingdale Borough
•East Lansdowne Borough
•Glenolden Borough
•West Chester Borough
•West Nottingham Township
•East Caln Township
•North Londonderry Township
•Bethel Township Authority
•Leacock Township
Our Approach (How we do it)
How we Do it cont…
Product Categories
Variations
Area-Flood
7000+
Canopy/Parking Garage
10000+
Lamp Post/Decorative
500+
Highbay/Lowbay
5000+
Linear/Troffer Solution
400+
Parking Lot
38000+
Spot/Track
1200+
Street/Roadway
15000+
Wall Pack/ Parameter
3000+
- As of 6/1/13
LED 101
Origin of LEDs
Electroluminescent Discovered in 1907
First LED Created in 1927
First Practical Use LED Created in 1962
Used Indicator Lamps, Alarm Clocks, Scientific
Instruments
What is an LED
Light-Emitting Diode: a semiconductor diode that emits light when
conducting current and is used in electronic equipment.
Tiny “Chip” comprised of layers of Semi-Conducting Material
Generate light through Electroluminescence
Traditional Lighting vs LED
Source Directionality Differences
Traditional light sources emit radiant energy in all directions (OMNI-Directional)
Light Distribution Differences
Near-Point Sources vs Multiple Point-Source Illumination
Lamp Housings vs Individual Optics
Light Generation Differences
Incandescent – Heated Filament
Fluorescent – Gas Discharge/Phosphors
HID – Electric Arc Discharge
All need glass bulb to contain gases/coatings
Traditional Lighting vs LED Example
460 Watt Parking Lot Fixtures
105 Watt LED Fixtures
Traditional Lighting vs LED Cont…
Light Trespass
When light strays from intended purpose and becomes a annoyance,
nuisance, municipal code violation, or determent to visual performance
Wasted Light
Glare
Sensation produced by luminance
within the visual field that is greater than
light to which the eye is adapted, in turn
causing discomfort or loss is visibility and
visual performance
Sky Glow
Brightening of night sky as a result of
reflected radiation scattered from the
atmosphere, in the direction of observer.
Traditional Lighting vs LED Cont…
Form Factor
Small size and directional light emissions enable low-profile and compact
lighting solutions
Must be carefully engineered (heat dissipation)
Infrared and Ultraviolet Emissions
LED are more efficient at generating light
Incandescent – Infrared radiation accounts for 90% of energy consumed
HID – Require ultraviolet-blocking outer bulb
Evaluating LED Lighting
Testing and Qualifications
LM-79
Optics and Light Distribution Capabilities
Standard test method for measuring the photometric properties of SSL
devices, allowing calculation of Luminaire efficacy.
LM-80
Lifetime Test
Thermal Management
Standard method for measuring lumen
depreciation of LEDs, allowing the calculation
of LED lifetime.
Both tests should be performed DOE approved Testing Laboratories
Evaluating LEDs Cont…
Lifetime
Lumen Maintenance
LM-79 – Absolute Testing
Percentage of initial light output produced by a light source at some percentage of rated useful life
Can be difficult when comparing to traditional lighting due to different methods used for testing
L70
“Rated-Life” term utilized by LED fixtures.
Evaluating LEDs
Color
CCT
Correlated Color Temperature
Relative color appearance of
white light source
2700K-6000K
CRI
Color Rendering Index
Measure of how a light
source renders
colors of objects
“0-100”.” 100 being equal
to actual object color
Evaluating LEDs Cont…
Light Output and Light Levels
Light Output
Lumen Output – Amount of light generated by luminaire
CCT Effect
Perception must be considered, but can be difficult to quantify
Foot-candles
Amount of Light that actually falls on a given
surface
Most important measurement for establishing
equivalency between traditional lighting and LEDs,
as well as comparing the effectiveness of various
LED luminaries.
Certifications and Listings
Designlights Consortium
LED Fixtures only
Energy Star
LED Lamps and certain fixtures
Non-LED products
Many utility companies that provide rebates will follow the guidelines
provided by either DLC or Energy Star.
Benefits of LED Lighting
Benefits of LED’s – Energy Reduction
Form Factor Example -
458 Watt HID Highbay
143 Watt LED Highbay
Benefits of LED’s – Maintenance Reduction
Light Generation Difference
Solid-State vs Gas or Filament
Fixture/Lamp Designed around functionality
Durability
Vibration and ON/Off Cycling Resistance
Lack of adverse heat effects (fusing)
Light Level Maintenance
Light Levels maintained longer
Consistent Light Quality
Benefits of LED’s – Visual Performance
Light Levels
Less “Hot Spots”
High average Foot-Candles
Light Quality
CCT and CRI
Perception of “Brightness” and safety
Directional Control
Light Trespass avoidance
Sky Glow avoidance (Dark Sky Compliant)
Benefits of LED’s – Controls!
Dimming
Many (not) LED products can be dimmed
Compatibility issues with existing Dimmers
CFL – Limited Dimming Range
HID – No dimming Range
On/Off Cycling and Instant On
LED’s not susceptible to life degradation from ON/Off cycles
Lumen output not affect
No Re-strike time
Control
Wireless control can enable multiple luminaire system wide
controls of on/off and dimming
Compatibly with communication types and existing control
systems
Benefits of LED Lighting - Conclusion
“It is estimated that switching to LED lighting over the next two decades could
save the country $250 billion in energy costs over that period, reduce the
electricity consumption for lighting by nearly one half, and avoid 1,800 million
metric tons of carbon emission”
-Department of Energy
Energy Efficiency and Renewable Energy
Funding Options
Straight Purchase (COSTARS Approved Vendor)
Phased Approach
Performance Contracting
Thank You!
Thank you for your time today, we appreciate your interest in
Stouch Lighting’s LED Lighting Products!
By providing multiple LED lighting products from various lighting
manufacturers, we will provide you with the best solution for your
environment.
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