STWT105E-1F864XOL32100S Medium-Low Intensity Aviation Obstruction Lighting System for storage tanks/water towers

Solution Series No.: STWT105E-1F864XOL32100S

Storage tanks / Water towers

Structure Type



Obstruction Lighting Arrangement

  • One medium intensity red obstruction light is on top of storage tanks/water towers, red steady or flashing 2000cd+25%
  • At least three low intensity single obstruction lights on the middle of storage/water towers, red steady>32.5cd. The quantity of low intensity lights depends on the horizontal plane’s diameter the lights are placed on.

Standard Reference

  • ICAO Annex 14 Volume I 2018, Chapter 6
  • FAA 70/7460-1L, Red Obstruction Lighting for painted water towers/storage tanks

Key Points


Operation Time


Illumination Color

2 levels

OB Levels

Medium Intensity + Low Intensity

Intensity Type

Electric powered

Power Type


Built-in photocell, External photocell, Control box

Control Type



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

Alarm Via

Battery backup box for DC OB system, UPS backup box for AC OB system

Backup Power

Solution Products

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