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Lighting of objects – High-intensity obstacle lights are…

  • A
    flashing-white.
  • B
    fixed-orange.
  • C
    fixed-red.
  • D
    flashing-red.

Refer to figures.
ICAO Annex 14
Chapter 6. Visual Aids for Denoting Obstacles

Table 6-1. Characteristics of obstacle lights

Light TypeColourSignal type/ (flash rate)
Low-intensity, Type A (fixed obstacle)RedFixed
Low-intensity, Type B (fixed obstacle)RedFixed
Low-intensity, Type C (mobile obstacle)Yellow/Blue (a)Flashing (60-90 fpm)
Low-intensity, Type D (follow-me vehicle)YellowFlashing (60–90 fpm)
Low-intensity, Type ERedFlashing
Medium-intensity, Type AWhiteFlashing (20–60 fpm)
Medium-intensity, Type BRedFlashing (20–60 fpm)
Medium-intensity, Type CRedFixed
High-intensity, Type AWhiteFlashing (40-60 fpm)
High-intensity, Type BWhiteFlashing (40-60 fpm)

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