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Aviation Light

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Obstruction Lights :
Definition of Obstruction Light

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.

Evolution of Obstruction Lights

Aviation obstruction lights has it’s origins in Europe and the United States in the early 1920s when night flying began to be a practical proposition. It was soon realized that critical obstacles needed to be lit in order to prevent collisions. Various lighting schemes were tried in various places – there was not the standardization that we have today through ICAO.

Lighthouse beacons or Obstruction Lights are used to protect accidents caused due to the ship strike to obstacles in the sea like islands, rocks etc. These Obstruction Lights were started in Seventeenth century.


Obstruction Lights are broadly divided into three following parts–
  • Low Intensity Obstruction Lights : These lights should be used where the object is a less extensive one and its height above the surrounding ground is less than 45 m.
  • Medium Intensity Obstruction Lights : Medium Intensity obstacle lights should be used where the object is an extensive one or its height above the level of the surrounding ground is greater than 45m.
  • High Intensity Obstruction Lights : These lights should be used to indicate the presence of an object if its height above the level of the surrounding ground exceeds 150m.

According to ICAO regulations Obstruction lights are divided in following types –

  • Low Intensity – Type A : Red color steady lights are used for fixed obstacles. Their minimum intensity should be 10 candelas.
  • Low Intensity – Type B : Red color steady lights are used for fixed obstacles. Their minimum intensity should be 32 candelas.
  • Low Intensity – Type C : These Yellow/Blue color flashing lights are used for mobile obstacles. Their minimum intensity should be 40 candelas.
  • Low Intensity – Type D : These Yellow color flashing lights are used for “Follow me” Vehicles. Their minimum intensity should be 200 candelas.
  • Medium Intensity – Type A : White color flashing lights are used for obstacles having height more than 45 meters. Their minimum intensity should be 2000 candelas.
  • Medium Intensity – Type B : Red color flashing lights are used for obstacles having height more than 45 meters. Their minimum intensity should be 2000 candelas.
  • Medium Intensity – 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 – Type A : White color flashing lights are used for obstacles having height more than 150 meters. Their minimum intensity should be 2000 candelas.
  • High Intensity – Type B : White color flashing lights are used for obstacles having height more than 150 meters. Their minimum intensity should be 2000 candelas.
  • Flags : Flags used to mark objects shall be displayed around, on top of, or around the highest edge of, the object.
  • Colored Patterns : Colored patterns used to mark objects should consist of rectangles of not less than 1.5 m and not more than 3 m on a side, the corners being of the darker color.
  • Obstruction Lights : The presence of objects which must be lighted shall be indicated by low, medium or high intensity obstacle lights, or a combination of such lights.

Aviation Light

Aviation Light

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Aviation Light

SINGLE EMITTER

High intensity, Single emitter, long life, energy saving, weather proof IP 55,
LED based, cast aluminium alloy(LM - 6) body, weather proof, painted with
corrosion resistant yellow paint, covered by hard ABS red cover dome
sealed with gasket, ultra bright AIGaAs Red LED,
power : 24 Watts,
lumens intensity 200 - 300 cd, life app. 10 year, input voltage 150 - 300 volt AC.
DOUBLE EMITTER

High intensity, double emitter, long life, energy saving, weather proof IP 55,
LED based, cast aluminium alloy body, painted with corrosion resistant
yellow paint, covered by hard ABS red cover dome sealed with gasket,
ultra bright AIGaAs Red LED, power:2 x 24 Watts, lumens intensity
400 - 500 cd, life app. 10 year, input voltage 150 - 300 volt AC.
SUPER GLOW, SINGLE EMITTER

Super glow intensity, single emitter, long life, energy saving,
weather proof IP 65, LED based, heavy gauge die-cast LM - 6
alloy body, painted with corrosion resistant yellow paint,
covered by thick & clear glass dome sealed with gasket &
retaining aluminium ring, ultra super bright Red LED,
power: 24 Watts, lumens intensity 1500 - 1700 cd,
life app. 10 year, input voltage 150 - 300 volt AC

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