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Fluorescent lamp output

What percentage of light output is lost when a bare fluorescent lamp is exposed to a temperature of 32deg Fahrenheit (0 Celsius)?
A. 10%, B. 25%
C. 35%, D. 50%


AnswerD. 50 percent. Wrap-around clear lenses are recommended for protection from wind and low temperatures. Vapor tight fixtures can maintain temperatures above the outside ambient temperature.
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 Related reading: the Precast Concrete Institute publishes several resources for parking facility lighting and recommended practices for exterior applications.

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