Why do wind turbines flash?

Modern wind turbines reach impressive heights of over 200 metres. At this height, they become potential obstacles for aeroplanes and helicopters. The rhythmically flashing lights, officially known as obstruction lights, fulfil a critical function:

• They make the installations visible to pilots from afar.
• They enable precise assessment of the height and position of the wind turbines.
• They actively contribute to the avoidance of collisions.

The ‘General Administrative Regulation on the Marking of Aviation Obstacles’ (AVV) regulates this safety aspect. Wind turbines must be marked from a height of 100 metres. The regulation defines precisely:

• The intensity of the lighting
• The rhythm of the flashing
• The positioning of the lights on the turbine

These clear specifications ensure that pilots can recognise wind farms in good time and fly around them safely - regardless of weather conditions or the time of day.

Technology is constantly evolving. Modern systems such as on-demand night-time signalling (BNK) only activate the lights when an aircraft is actually approaching. This is where Light:Guard comes in:

As a specialised service provider, Light:Guard supports wind farm operators in the implementation of advanced BNK systems. The process includes:

• Analysing the specific requirements of the wind farm
• Installation of precise detection systems for air traffic
• Integration of the BNK into existing infrastructures
• Ensuring compliance with all legal requirements

With Light:Guard's expertise, operators benefit from

• Significant reduction of light emissions by up to 98%
• Increased acceptance among the local population
• Optimised energy consumption of the lighting systems
• Future-proof technology that fulfils all legal requirements

With Light:Guard's solutions, wind turbines only flash when it is really necessary - a decisive step towards reconciling safety, efficiency and residents' interests in modern wind energy.