D464-A13-001 Datasheet, PDF (4/4 Pages) Dialight Corporation – LED Based L-864 Red Medium Intensity Beacon for Obstruction Applications

Minimized Ground Scatter
Sharp Beam Cutoff To Prevent Light Pollution
Light Pollution
In lighting, it has always been a challenge to direct light where it is needed and cutoff light where it is
not wanted. Over the years, flashing beacon lights that direct light downward into residential areas
have caused numerous complaints and legal battles. This light pollution is caused primarily by
limitations of the optical designs. Dialight has overcome this problem with a patented reflector based
optics system designed specifically for the obstruction signals application. Dialight's optics technology
creates the sharpest beam cutoff in the industry by directing almost no light downward.. The controlled
beam pattern results in essentially zero light pollution. The chart below shows the light pollution (amount
of light seen) at various distances for several 2,000 candela red beacons mounted on a 150-foot
tower. The Dialight beacon maintains extremely low light levels to the ground while ensuring that aircraft
see the required 2,000 candelas.
Dialight reserves the right to make changes at any time in order to supply the best product possible.
The most current version of this document will always be available at:
http://www.dialight.com/Assets/Brochures_And_Catalogs/Signaling/MDTF464X001.pdf
www.dialight.com
MDTF464X001_A
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