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1. Energy Efficiency
5/19/2024
Lighting
Akrem Awad
1

2. Three Most Important Areas in
Energy Efficient Lighting
Meet target light
levels
Efficiently produce
and deliver light
Automatically
control lighting
operation
Visual Task
F O O T C A N D L E S
WATTS
LUMENS
Visual Task
Most Important Slide in Today’s Seminar!
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3. Energy Efficiency
3
1.Introduction
2.Types of lighting systems
3.Energy efficiency and other
considerations
5/19/2024

4. •Lighting energy consumption 20-45% in
commercial buildings
•Significant energy savings can be realized with
a minimal capital investment and common
sense
•For example, replacing high pressure sodium
Fixtures with LED Fixtures (JESSUP)
Background
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5. Quality of Illumination
Quality of illumination may affect worker
productivity:
Glare. Too bright.
Uniformity of illumination.
Color rendition. Ability to see colors
properly.
Scale 0 to 100 (100 is best)
Color Temperature. Warm to Cool.
Measured in degrees Kelvin (K).
3000 is warm (yellowish); 5000 is
cool or “daylight”.
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6. Energy Efficiency
1.Introduction
2.Types of lighting systems
3.Energy efficiency and other
considerations
5/19/2024 6

7. Types of Lighting Systems
High pressure sodium lamps
Low pressure sodium lamps
Mercury vapor
Metal halide
LED lamps (light-Emitting Diode)
Incandescent lamps
Tungsten Halogen Lamps
Fluorescent lamps
High Intensity
Discharge
(HID) lamps
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8. Ballasts
Old type ballasts were
electromagnetic.
New ballasts are electronic
Lighter, less noisy, no lamp flicker,
dimming capability.
Maximize your energy savings by selecting electronic ballasts
with Low ballast factor that provides target illuminance.
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9. Types of Lighting Controls
Occupancy Sensors
Photo Sensors
Lighting Control
Systems
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10. LED Lamps
Newest type of energy efficient lamp
Two types:
•red-blue-green array
•phosphor-coated blue lamp
Emit visible light in a very narrow spectrum and can
produce “white light”
Used in variety of applications over vast
spectrum of spaces
Technology is rapidly progressing
Significant energy savings: 82 –93%
Longest lamp life: 40,000 –100,000 hrs
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11. LED vs. Fluorescent Lamp
LED
Popular T8 Brand
Fluorescent
Watt Rating, typical B.F. =
0.8
22W 34W
Lumens, initial Equivalent 2850
CRI 85 85
Color Temperature 5000K 5000K
Life Expectancy 10 years
20000 hours
16000 hours
Light output at 0°C
20%
increase
50% decrease
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12. Energy Efficiency
1.Introduction
2.Types of lighting systems
3.Energy efficiency and other
considerations
5/19/2024 12

13. Jessup Warehouse LED retrofit
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14. HVAC
Savving
Qty Fixture Description Fixt. Description $ $ KWh $ $ 0.1 $ Year %
196 250WATT HPS
150W-LED INDUSTRIAL BAY
LIGHT
$226 $44,290 104,429 $10,443 $14,700 $1,044 $26,187 1.69 59.1%
467 8FT - T32 83WATT FL
8FT LED STRIP 6000- LUMEN
4000K & Occupancy Sensors
$268 $124,937 63,886 $6,389 $31,756 $639 $38,783 3.22 31.0%
663 $169,227 168,314 $16,831 $46,456 $1,683 $64,971 2.60 38.4%
Estimated
Total Rebate
Total 1
st
year
saving
PaybackROI
Total Fixture
replacement
Pre Installation Post Installation Total CostSavingsUnit Sell
Energy
SAVINGS Jessup Warehouse LED retrofit
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Simple payback is the number of years it will take
for the savings to pay for the initial cost.
[ Initial Cost / Annual Savings ]
ROI "return on investment“ is the rate of return
(percentage) on an investment over a period
(years).
[ 1 / Simple Payback ]

15. Schaefer Tower Garage LED retrofit
5/19/2024
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16. Schaefer Tower Garage LED retrofitQty Fixture Description
Fixt.
Description
$ $ KWh $ $ 0.1 $ Year %
115 2 X F96T8 78W LED $368 $42,320 42,311 $4,231 $6,900 $423 $11,554 3.66 27.3%
115 $42,320 42,311 $4,231 $6,900 $423 $11,554 3.66 27.3%
Savings
Energy
SAVINGS
Estimated
Total
Rebate
Total 1
st
year
saving
Payback ROI
HVAC
Savving
Total Fixture
replacement
Pre Installation
Post
Installation
Unit SellTotal Cost
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Simple payback is the number of years it will take
for the savings to pay for the initial cost.
[ Initial Cost / Annual Savings ]
ROI "return on investment“ is the rate of return
(percentage) on an investment over a period
(years).
[ 1 / Simple Payback ]

17. Governor office at Schaefer Tower
LED retrofit
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18. Governor office at Schaefer Tower
LED retrofitQty Fixture DescriptionFixt. Description $ $ KWh $ $ 0.1 $ Year %
24 4 X 32W T8 2x4 High def LED $209 $5,016 3,370 $337 $1,800 $0 $2,137 2.35 42.6%
46 8'" downlight 8" Dpwn light LED $255 $11,730 12,917 $1,292 $2,760 $129 $4,181 2.81 35.6%
70 $16,746 12,917 $1,292 $2,760 $129 $4,181 4.01 25.0%
Total 1
st
year
saving
Payback ROI
Total Fixture
replacement
Pre InstallationPost InstallationUnit SellTotal CostSavings
Energy
SAVINGS
Estimated
Total
Rebate
HVAC
Savving
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Simple payback is the number of years it will take
for the savings to pay for the initial cost.
[ Initial Cost / Annual Savings ]
ROI "return on investment“ is the rate of return
(percentage) on an investment over a period
(years).
[ 1 / Simple Payback ]

19. Improved Color Rendition/Visibility in Space
Longer Lamp Life
Less Maintenance (Normally a result of longer lamp life)
Adjust to target light levels
Improved Controls
HVAC Savings –Typically (1% to 2%) above
lighting savings for cooled spaces
Incentive from Utility Rebates
Other Benefits
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20. Hazardous Waste Disposal
Under current federal law, mercury-containing lamps
(fluorescent, HID) may be hazardous waste.
Lamps containing mercury that fail the
Toxic Characteristic Leaching Procedure (TCLP) test
must be recycled!
EPA encourages responsible disposal practices
to limit the release of mercury into the environment.
TYPICAL MERCURY CONTENT OF VARIOUS LAMPS
250 watt Metal Halide lamp 38 mg
250 watt High Pressure Sodium lamp 15 mg
Typical T8 Fluorescent Tube 4-5 mg
Typical Compact Fluorescent (CFL) 4-5 mg
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21. Fluorescent Lamp/Ballast Change-out vs.
New Fixture “Rules of Thumb”
Install new fixtures when:
•Existing fixtures are over 20 years old
•Lamp holders are worn out
•Multiple components are failing
•Design requires change in fixture type
Retrofit existingfixtures with lamps & ballasts when:
•Existing fixtures are less than 20 years old
•Lamp holders and other components are still good
•Budget is very tight
•Expensive/Difficult/Environmental Conditions
Present (i.e. asbestos or excessive piping
and ducts in ceiling, etc.)
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22. Energy Efficiency: Lighting
THANK YOU
FOR YOUR
ATTENTION
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