Looking for Opportunities
in Lighting
Tom Coughlin
Program Manager – Commercial Lighting
Looking for Opportunities – simple retrofits
•Lamp and Ballast Replacement
•Take a 3 lamp T-12 system – 103W
•3 lamp standard T-8 system – 88W – 15 watts saved
•3 lamp High Performance T-8 system – 73W – 30 watts saved
Lighting 101 - the lamps
Lighting 101 - the lamps

Fluorescent lamps described by diameter








T-12 - 8/12th of an inch
T-8 – 8/8th of and inch
T-8 – 5/8th of an inch
Color rendering index (CRI) above 80 is good
Color Temperature 2100 deg K to 3600 deg K is warm
white
Initial and mean lumens
Lumen maintenance factor
Efficacy – measure of efficiency – lumens per watt.
Lighting 101 - the lamps

Fluorescent lamps described by a code, some
examples
 F40T12CWES - 34W T-12 energy saving cool
white
 F32T8-841 - 32W T8 w/ a CRI of >80 and a 4100
degree K color temp
Lighting 101 - the ballasts

Applies power to start a lamp then maintains
current
Magnetic ballasts (inductive ballasts)

Electronic ballast



Run at a higher frequency (20KHz) and have
electronics to control starting features and maintain
current
Greater efficiency
Lighting 101 - the ballasts




Different types of electronic ballasts
Rapid Start – Least efficient being phased out
Instant Start - Most Efficient
Program Rapid Start – Good where occupancy
controls are used
“High Performance” Lamps and Ballasts

What is a High Performance T8 System







Definition established by the Consortium for Energy Efficiency
High ballast efficacy factor
Lamps that are high efficacy – lumens per watt
CRI>80
Higher initial and mean lumens (3100 initial, 2900 mean)
Higher lumen maintenance factor (> 94%)
Longer life – rated at >24,000 hours
Go to www.cee1 for more information.
Information on “low wattage” T8 systems can be found there as
well (25W and 28W T8 systems
Upgrade to an efficient fixture

What is a high efficient troffer
¾
¾
¾
¾
Looks like the same as a non- efficient
fixture
Constructed to get more of the light
from the lamp into the space
Increased uniformity and comfort
Less watts – typically fewer lamps to
replace
Upgrade to an efficient fixture
fixture options




Prismatic lensed troffer >83%
Parabolic > 75% or >80% to meet NY’s new
construction code
So called “basket fixture” and 2x2 prismatic and
parabolic >70%
Upgrade to an efficient fixture

fixture options


Direct indirect pendant fixture > 80% mostly for
new construction
Low Glare high performance fluorescent troffer
>85%
Image from Lithonia Lighting
Image from Focal Point
What’s wrong with this design?
Lighting 201 – Lighting design considerations




Design for uniformity and
less contrast on walls,
ceilings and work surfaces
Reduce glare
Proper light levels – over
lighted spaces are as bad
as under lit spaces
A high efficient fixture with
thoughtful layout actual
helps to accommodate
these attributes.
High Performance T8 Troffer
Image from Lithonia Lighting
Low Glare High Performance Troffer
Image from Ledalite
Direct / Indirect Pendent Lighting
Industrial Lighting

High Intensity Discharge

High Intensity Fluorescent
Lighting 301 – High Intensity
Discharge
Image from USDOE Energy Efficiency and Renewable Energy
Lighting 301 – High Intensity
Discharge




Mercury Vapor – Old technology
Metal Halide – Good color rendering
High Pressure Sodium – More efficient –
lower color rendering
Low Pressure Sodium – Most efficient but
extremely poor color rendering
Image from USDOE Energy Efficiency and Renewable Energy
Lighting 301 – High Intensity
Discharge
Image from the Mass Turnpike Authority
Looking for Opportunities - High Bay Lighting
High Intensity Fluorescent





Better Color Rendering
More Efficient
Able to shut off lights when space is not being
used
Occupancy controls can be used.
High Intensity Fluorescent
Warehouses
Gymnasiums
Gymnasiums
Skating Rinks
Lighting Controls
Occupancy sensors



Dual mode – ultrasonic and infrared or
sound and infrared
Adjustments – typically sensitivity and
delay
Hi-low controls (best with HID fixtures)
Daylight Dimming Controls




Perimeter fluorescent fixtures
Areas with skylights (especially high bay
applications with HIF fixtures)
LED – Reach in refrigerators
Image by GE
Image by Hussman
LED Lighting- Down Lights
Image by Cooper Lightng - Halo
Image by Cooper Lightng - CREE
LED Lighting- Parking Garages and Industry
Image by BetaLED
THANK-YOU