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.
The ILC 2017 goal was to replace 1 million standard troffers, or roughly 100 million square feet of light space by April 2017. Achieving this goal represents savings of approximately 60 million kilowatt-hours, the equivalence of the annual electricity use in 5,500 homes. This goal was surpassed in January 2017. Participants to date have already upgraded over 1,250,000 troffers for a total national energy savings of 2.6 trillion BTUs or the equivalent of $26.7 million in energy savings.
This effort is a collaboration between the Building Owners and Managers Association International (BOMA), Illuminating Engineering Society of North America (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.