Quote:
Originally Posted by MichaelB
So that brings up a few questions:
What is the height requirement for the red lights we see on the taller buildings reguardless of other lighting? EX: As bright as Frost Bank in, there are still 4 red lights on the top.
Second: Is red the only color allowed? Or does having red in the rotation qualify?
Could this be what these lights are? ('Cause, quite frankly they do not create much of an effect otherwise!)
Anybody know or want to venture a guess?
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I don't know the answers but I found the related FAA document that regulates lighting/marking requirements for structures. Java session prevents me from directly posting link but if you go to faa.gov and go to Advisory Circulars section you can search for AC70_7460_1K (Obstruction Marking and Lighting).
From what I can discern if a building is 500 feet above ground level or less than it is required to have steady/flashing red lights for night and medium intensity flashing white lights for day/twighlight. If builder chooses to use high intensity flashing white light this can be substituted for other marking requirements. These are not required for structures less than 150 feet. Once you get above 500 feet you also have to add orange/white paint onto structure?
Exact colors, beam intensity, and flash rates for the lights are specified by AC 150/5345-43F (Specification for Obstruction Lighting Equipment). White and Red are only options and they are very specific about what color white and red qualifies.