About the Interior Lighting Campaign

Building owners can save more than 50% on a one-for-one basis, and up to 80% with the use of controls.

Lighting accounts for roughly 15-20% of the electricity use in a typical commercial building, and the most commonly used light source in these indoor applications is the linear fluorescent lamp.

In 2010, lighting systems using linear fluorescent lamps accounted for over 75% of the installed lighting in commercial buildings. Troffer luminaires, commonly available in 1'x4', 2'x4', and 2'x2' sizes, represent half of all commercial fluorescent lighting fixtures. The total installed stock of troffers in the United States is estimated to be over 360 million luminaires.

Troffers operate for more than 10 hours a day and collectively consume over 96.7 TWh of electricity annually, as much energy as 8.9 million homes would consume in a year. By adopting the Better Buildings Alliance specification for troffers, building owners can save more than 50% on a one-for-one basis, and up to 80% with the use of controls. The specification encourages greater reduction in connected power through the use of efficient LED sources and lighting controls, but does not limit troffer upgrades strictly to LEDs.

For more information, see the Upgrading Troffer Luminaires to LED fact sheet.

ILC's Goal

The ILC's goal is to replace or newly install at least 2 million troffer, high-bay, low-bay, and suspended linear lighting systems and controls.  This goal reflects annual savings of about $34.5 million in electricity costs and nearly 326 million kWh savings across a wide set of our Nation's buildings annually. 

ILC Partnerships

This effort is a collaboration between the Illuminating Engineering Society (IES), the International Facility Management Association (IFMA), U.S. General Services Administration (GSA), and the U.S. Department of Energy. Organizations that do not directly own or manage facilities, but support energy efficiency in buildings through the adoption of high efficiency lighting products and strategies are eligible to join as supporting partners. Supporting partners, including utilities, manufacturers, energy efficiency organizations, lighting designers, and ESCOs are listed on the Supporters page of this website. Supporters are encouraged to share information about the ILC with their customers. In addition to being listed on the ILC website, supporting partners may be recognized for their involvement with participating sites that receive ILC recognition. The U.S. Department of Energy provides technical support to the campaign and its participants.

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