Skeptical Science is partnering with Gigafact to produce fact briefs — bite-sized fact checks of trending claims. You can submit claims you think need checking via the tipline.Skeptical Science is partnering with Gigafact to produce fact briefs — bite-sized fact checks of trending claims. You can submit claims you think need checking via the tipline.
The flicker of a wind turbine shadow is far below the minimum frequency required to trigger photosensitive epilepsy.
A wind turbine is said to produce a “shadow flicker” when its rotating blades pass between the sun and an observer, creating a repeating pattern of light and shadow.
Photosensitive epilepsy is triggered at frequencies of 3 Hz or higher, or 3 flashes of light per second. Wind turbines generate flicker frequencies of 0.5 to 1 Hz, well below the known minimum trigger frequency.
One study calculated that a typical three-blade turbine would need to operate at 60 rotations per minute (rpm) to potentially trigger photosensitive epilepsy. Modern turbines operate at maximum speeds of only 15 to 17 rpm.
Research and public health surveys have not established a phenomenon of wind turbine-induced photosensitive seizures.
Go to full rebuttal on Skeptical Science or to the fact brief on Gigafact
This fact brief is responsive to quotes such as this one.
Sources
U.S. Department of Energy Shadow Flicker
Massachusetts Department of Environmental Protection Wind Turbine Health Impact Study: Report of Independent Expert Panel
Front Public Health Journal Wind Turbines and Human Health
IEEE Environment Impact Assessment for New Wind Farm Developments in Ukraine
Energy Reports Journal Occupational health hazards and risks in the wind industry
Columbia Law School Sabin Center for Climate Change Law Rebutting 33 False Claims About Solar, Wind, and Electric Vehicles
Please use this form to provide feedback about this fact brief. This will help us to better gauge its impact and usability. Thank you!
About fact briefs published on Gigafact
Fact briefs are short, credibly sourced summaries that offer "yes/no" answers in response to claims found online. They rely on publicly available, often primary source data and documents. Fact briefs are created by contributors to Gigafact — a nonprofit project looking to expand participation in fact-checking and protect the democratic process. See all of our published fact briefs here.
Posted by Sue Bin Park on Tuesday, 10 March, 2026
 |
The Skeptical Science website by Skeptical Science is licensed under a Creative Commons Attribution 3.0 Unported License. |