CMCT105E-MI-XF865 White Medium Intensity Aviation Obstruction Lighting System for chimneys/cooling towers

Solution Series No.: CMCT105E-MI-XF865

Chimneys / cooling towers (painted)

Structure Type



Obstruction Lighting Arrangement

  • All obstruction lights in this system are white medium intensity beacons, white flashing 20-60FPM, 20,000cd at day and 2,000cd at night
  • At least three units of white medium intensity obstruction lights are placed near the top level, which is 6m lower than the top edge to avoid chemical emissions and heat generated from the chimney or cooling tower. The quantity on top depends on the diameter of the horizontal plane the lights are placed on.

Standard Reference

  • ICAO Annex 14 Volume I 2018, Appendix 5-1: Medium Intensity flashing-white obstacle lighting system, Type A
  • Aerodrome Design Manual Doc 9157 Part 4
  • FAA 70/7460-1L, White Obstruction Lighting for chimney/flare stacks

Key Points


Operation Time


Illumination Color

1 level

OB Levels

Medium Intensity

Intensity Type

Electric powered

Power Type


Built-in photocell, Control box

Control Type



Through built-in dry contacts in OB lights, Through dry contacts in control box

Alarm Via

UPS backup box for AC OB system

Backup Power

Solution Products

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