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1. Evaluating the Costs of LED Lighting Upgrades
Case Study: Relighting SMU’s Underwood Law Library
Susan Nodorft | Major Account Representative
SYLVANIA Lighting Solutions
www.osram.us/ls
Larry Helpert | P.E., CEM, MEP Engineer
Office of Facilities Planning and Management
Southern Methodist University

2. 2
Relighting SMU’s Underwood Law Library
Situation
• 40-year old, 100,000 sq. ft. building was equipped with a mix
of older T8/electronic ballast fluorescent lighting technology.
• Lighting control was possible only by switching breakers.
• A series of building expansions offered no additional switching
for the dozens of group and single study rooms.
• Lights stayed on in all rooms up to 18 hours per day, whether
in use or not, using 1.75 million kWh/year of electricity.
Goals
• Develop a choice of good-better-best lighting upgrade
scenarios from which the university could choose.
• Improve light output, protect rare book collection from harmful
UV radiation and generate energy cost savings.
• Choose best-in-class lighting and control technology to
maximize ROI for the project
The largest private academic law library west of the
Mississippi, SMU’s Underwood Library holds almost 700,000
volumes including an outstanding rare book collection.

3. 3
Solutions: An array of Good-Better-Best Options
Features
• Relamp all fixtures to LED tubes
using existing ballasts
Pros
• More energy-efficient lamps and
fixtures save energy
• 5 year warranty on lamps
Cons
• Old ballasts without warranty
• No control of lighting
Anticipated Results
• Energy Savings: 366,000 kWh/yr.
• Energy cost savings: $22,000/yr.
Features
• Dimming drivers and LED tubes with
sensors in study rooms
• Switches/sensors in rare book room
Pros
• Improved drivers provide higher power
in fixtures for brighter lighting
• Dimming components already in place
for eventual upgrade to more
sophisticated controls
• 5 year warranty on all components
Cons
• Does not address large open areas
Anticipated Results
• Energy Savings: 780,000 kWh/yr.
• Energy cost savings: $47,000/yr.
Features
• Dimming drivers and LED tubes, with
sensors in study rooms
• Switches/sensors in rare book room
• Single-fixture sensors
• Programmable controls to dim lights
outside operating hours and fine tune
savings
Pros
• Improved drivers provide higher power
in fixtures for brighter lighting
• Ability to individually address each
fixture to maximize savings
• 5 year warranty on all components
Cons
• Most expensive option
Anticipated Results
• Energy Savings: 955,000 kWh/yr.
• Energy cost savings: $57,000/yr.
Good Better Best

4. 4
The Approved Solution: The “Better” Option
Solution
• Programmable dimming drivers and LED tubes
• Sensors in areas such as study rooms where the largest
potential savings occur throughout operational hours
• Switching system with sensors in the rare book room, to
minimize unnecessary illumination on historic works
• Improved drivers allow for higher power factor to provide more
light in specific fixtures where additional lighting is needed
• Dimming components are in place to add programmable and
more sophisticated large area controls to a master control
software, to be added as capital budget becomes available.
Anticipated Results
• Energy consumption reduced by 55%
• Typical ROI of 5 years for the project

5. www.osram.com/lightingsolutions
Thank you.