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Shadow flicker occurs when the sun is low on the horizon and shines through the rotating blades of a wind turbine casting a moving shadow. Although in many cases shadow flicker occurs only a few hours in a year, it can potentially inconvenience the people residing close to the wind farm.  

The WinWind project analysed the regulatory framework of Germany, Italy, Latvia, Norway, Poland, and Spain and found that: Germany has a specific guideline that establishes binding limits for mitigating the effect of shadow flicker; in Norway although no limit values are established, guidelines for assessing shadow flicker values were adopted. The other countries have no regulations at all.

Find out more

The WinWind project analysed the main health concerns related to shadow-flickers. Here below further readings:

On concept and health concerns
Technical and socio-economic conditions page 33

On shadow-flickers regulations in the six countries analysed
Screening of Technical and Non-Technical regulations, guidelines and recommendations pages 9-11