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US Energy for Lighting
Electric Lights Use Energy
Lighting uses 273 billion kilowatt-hours in the US. That’s 7% of total U.S. energy consumption.
Daylight Uses Zero Energy.
The next time you’re in the grocery store, look up. If you don’t see skylights, tell someone. Don’t see enough windows? Tell someone. Our retail stores and building managers need to hear from all of us, because natural interior daylight needs no electricity —and therefore burns no fosil fuels. And be sure your home has enough window and skylights. Everyone has a #RightToDaylight.
Lead By Example
- Why don't we see more natural interior daylight?
Eneref Institute has identified seven primary reasons we don’t see more natural interior daylight in our buildings. To learn the seven market obstacles to daylighting, download Eneref Institute’s report.
See report: Seven Market Obstacles to Daylighting
- Does natural interior daylight pay for itself?
Lighting accounts for roughly 20 percent of the electricity used by commercial or educational facilities in the United States. Whereas natural interior daylight requires no energy beyond sunlight. And Natural interior daylight is about 10-times more efficient than rooftop PV cells for lighting a room.
- Do students preform better under natural daylight?
There is also plenty of evidence that daylighting improves occupant productivity in both schools and offices. Especially in learning environments, skylit classrooms provide a natural and stimulating space for teacher and student. While studies show that poor lighting adversely affects learning, daylighting has been proven to increase student performance in math and reading scores, as well as improving attendance.
- How do office workers perform under natural interior daylight?
Studies show that office workers have few sick days. The human performance numbers in daylighting systems are important because the ROI for daylighting installations can sometimes be a difficult sell. In fact, the human performance gains can outweigh the energy savings, where human performance can be measured in financial terms.
- Sustainable buildings reduce 80% carbon foot print
According to Buildings Commissioner Rick Chandler, small steps towards designing more sustainable buildings can make a big dent in the City’s carbon footprint – reducing emissions as well as energy bills. Through expanded benchmarking Mayor de Blasio’s vision of reducing 80 percent of our carbon emissions by 2050 might be realized.