Obstruction Light or Aircraft warning light is a light specifically designed to illuminate tall buildings, high-rise structures, and any other objects that may interfere with air traffic.
This is used to enhance the visibility of structure or fixed obstacles which may conflict with the safe navigation of aircraft. Obstruction Lighting is commonly installed on towers, buildings, and even fences located areas where aircraft may be operating at low altitudes.
Some aviation regulations mandate the installation, operation, color and/or status notification of obstruction light.
SEVERAL TYPES OF LIGHTS