Abstract: The present invention relates to a beacon light (100) for aviation obstacle warning comprising an elongated body portion formed into a hollow tube (19), a plurality of light emitting diodes (LEDs) (10) mounted on the outer surface of the hollow tube (19) and electrically connected together to form a substantially cylindrical array of LEDs (10), characterized in that a plurality of grooves (21) are formed axially on the outer surface of the hollow tube for arranging the array of LEDs (10) in a substantially cylindrical and orderly manner, and the hollow tube and the LEDs (10) being encapsulated with sealing composition (11), wherein at least a part of the lens body of the LEDs (10) protrudes out from the surface of the encapsulation to allow the direct emission of light. The LEDs (10) are affixed along an elongate conductor set within the grooves (21) and the surface of the body portion.