• Dhiraj Badane

Aviation Obstruction Lighting for High Rise Building


Air accidents cause immense loss to human life & property. History is witness to innumerable air disasters. Accidents can be avoided by small precautions. Obstruction Light in compliance with International Civil Aviation Organization [ICAO] Annex 14 regulation is the solution to these problems which warns pilot of any obstacle coming in the airway path.



What is obstruction lighting:

A light indicating the presence of an object which is dangerous to an aircraft in flight. The obstruction light is to be mounted at the highest point of the wind cone assembly to avoid being obscured by any other part when viewed from above

Selection & location of Obstruction lights is done as per ICAO Annex 14regulation.



Types of obstruction lighting & Its application:

  • Low Intensity Obstruction Lights: Lights should be used where the object is a less extensive one & its height above the surrounding ground is less than 45 m.

o Type A: Red color steady lights are used for fixed obstacles. Their minimum intensity

should be 10 candelas.

o Type B: Red color steady lights are used for fixed obstacles.Their minimum intensity should be 32 candelas.

o Type C: These Yellow/Blue color flashing lights are used for mobile obstacles. Their

minimum intensity should be 40 candelas.

o Type D: These Yellow color flashing lights are used for “Follow me” Vehicles. Their

minimum intensity should be 200 candelas.


  • Medium Intensity Obstruction Lights: Lights should be used where the object is an extensive one or its height above the level of the surrounding ground is greater than 45 m.

o Type A: White color flashing lights are used for obstacles having height more than 45

meters. Their minimum intensity should be 2000 candelas.

o Type B: Red color flashing lights are used for obstacles having height more than 45

meters. Their minimum intensity should be 2000 candelas.

o Type C: Red color fixed lights are used for obstacles having height more than 45

meters. Their minimum intensity should be 2000 candelas.


  • High Intensity Obstruction Lights: Lights should be used to indicate the presence of an object if its height above the level of the surrounding ground exceeds 150 m.

o Type A: White color flashing lights are used for obstacles having height more than 150

meters. Their minimum intensity should be 2000 candelas.

o Type B: Red color flashing lights are used for obstacles having height more than 150

meters. Their minimum intensity should be 2000 candelas.


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