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FAA L-857

FAA L-857 high intensity white obstruction light at 60 flashes per minute (fpm)

 

Intensity Requirements and Beam Spread

StepHorizontal Beam Spread (degrees)Vertical Beam Spread (degrees)Effective Intensity (Candela)
Day90 or 1203-7140,000 +/- 25%
Twilight90 or 1203-720,000 +/- 25%
Night90 or 1203-72,000 +/- 25%

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