Case Study Details


Kent State University upgrades high-pressure sodium area lighting with Lithonia Lighting D-Series LED Lighting and Controls to provide $77,800 in reduced energy costs each year, maintenance savings, and reductions in greenhouse gases.

Passed in 2006, Ohio House Bill 251 requires institutions of higher learning to develop plans to reduce energy consumption by at least 20 percent by the end of 2014. To achieve this goal, Kent State University has launched an energy efficiency and sustainability initiative on its Kent Campus (29,000 students).

A key project in Kent State’s overall energy reduction plan included a retrofit of the lighting in the university’s more than 40 parking lots and along multiple roadways on the 941-acre Kent Campus. While reduced energy consumption was the primary objective, the university also wanted to improve campus-wide safety and security as well as overall aesthetics.

By upgrading to the D-Series LED Area Size 1 luminaires, Kent State will save 778,000 kilowatt-hours annually. At average U.S. energy costs of 10 cents per kWh, this would represent a $77,800 reduction in energy costs each year. Energy savings are estimated at 76 percent over the previous HPS system and are equal to the greenhouse gas emissions from 114 passenger vehicles.

The reduction in energy consumption, however, does not equate to a reduction in light levels. With the upgrade, the university replaced 464-watt HPS fixtures with 106-watt LED luminaires while still providing a brighter campus.

Besides achieving considerable energy savings, Kent State will significantly reduce its overall maintenance costs.

Due to the results and success the university experienced, staff members from Kent State’s Office of the University Architect have made the D-Series LED luminaires the standard for all area lighting in new parking facilities.

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