A single wind turbine or wind turbine farms, which has the potential to endanger aviation in navigable airspace or has the potential to interfere with the operation of navigation, should be lighted.
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Aviation Obstruction Light on Wind Turbines
Date：1/9/2019 10:58:21 PMBASIC RULES
The number of light levels recommended depends on the height of the structure;
The obstacle lights should be installed on the nacelle to provide an unobstructed view for aircraft approaching from any direction;
Obstruction lights are applied to identify the perimeter of the wind farm;
The diameter of the structure determine the number of lights installed at the top and at each obstruction light level.
LIGHTS SPECIFICATIONS
When lighting is deemed necessary, medium-intensity obstacle lights should be used.
In the case of a wind farm, i.e. a group of two or more wind turbines, it should be regarded as an extensive object and the lights should be installed:
to identify the perimeter of the wind farm;
respecting the maximum spacing of 900 m, between the lights along the perimeter, unless a dedicated assessment shows that a greater spacing can be used;
so that, where flashing lights are used, they flash simultaneously; and
so that, within a wind farm, any wind turbines of significantly higher elevation are also identified wherever they are located.
