Performance of Specular Reflectors Used for Lighting Enhancement
CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL ENERGY AND UTILITIES SYSTEMS DIV
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Since lighting accounts for about 20 to 30 percent of the total utility bill on Army installations, many installations try to lower lighting costs by retrofitting or upgrading to more efficient lighting systems. This study evaluated the effectiveness of specular reflectors used to enhance the effectiveness of two-lamp fixtures, which are claimed to enhance light levels of such fixtures by 50 to 100 percent, reducing the number of lamps required to light a given area. Light levels and light distribution of two-lamp fixtures were measured before and after installation of specular reflectors to measure the change in lighting intensity, and to see if the use of reflectors changed the fixture spacing criteria. It was found that reflectors increased the ambient light levels from 9 to 34 percent, but did not increase the spacing criteria. It is recommended that specular reflectors be considered for two-lamp lighting applications not constrained by maximum spacing criteria, where illumination falls below recommended or desired levels. Specular reflectors, Reflectors, Lighting.
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