This term refers to the shadows cast by wind turbine blades as they rotate in front of the sun, similar to the shadow cast by a tree blowing in the wind. By positioning wind turbines at a carefully calculated angle and distance from dwellings, Apex ensures that most homes in a project experience no shadowing at all. For those that do, shadowing will occur for no more than a few minutes per day, on average. Shadowing does not occur on cloudy or foggy days and a typical local wind ordinance might limit shadow flicker to no more than 1% of all daylight hours over an entire year.

Some worry that this flicker can cause seizures in photosensitive individuals. However, according to the Epilepsy Foundation’s research, the rate at which wind turbine shadows “flicker” is far below the frequency associated with seizures.