Building Energy Exchange announces Daylight Hour 2025, an annual global social media campaign that promotes energy efficiency in the built environment by encouraging offices to limit artificial light use in daylit spaces.
On June 20, 2025, from 12-1pm (local time), offices around the world are invited to participate by turning off their lights for one hour and sharing their involvement on social media. By turning off non-essential lighting and embracing natural daylight, offices demonstrate their commitment to sustainability while engaging in climate action alongside others around the world.
2025 Daylight Hour campaign is powered by Lutron, a global leader in creating innovative lighting, shading, and control products that reduce waste, enhance efficiency, and improve people’s lifestyles.
May 15, 2025
The Daylight Hour campaign, a project by Building Energy Exchange, raises awareness for energy efficiency, particularly in commercial office buildings, by highlighting how utilizing daylight in workspaces is an impactful and easy way to reduce energy use and associated carbon emissions. Daylight Hour takes place on the summer solstice, the longest day of the year, when sunlight is most abundant in the northern hemisphere. In addition to energy benefits, daylighting can contribute to a healthier office environment by increasing productivity, regulating circadian rhythms, and reducing eye strain.
Daylight Hour places an emphasis on social media engagement through the #DaylightHour hashtag to encourage registrants to share their involvement and increase awareness around the energy, climate, health, and comfort benefits of natural daylight. In past years, participants in commercial and home offices alike have shared creative photos and videos from their workspaces and competed for Daylight Hour recognition and participation awards, such as Best View, Most Spirit, and Most Photogenic.
