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Craig A. BerneckerLuminaire Maintenance as an Energy Saving Strategy Anthony Cerino 104 Engineering Unit "A", University Park, PA 16802, USA Abstract The concern for energy efficiency of lighting systems has led to the introduction of many new technologies and products. In the search for innovative ways to save energy simple yet effective means of achieving this goal may be overlooked. Among these is proper lighting system maintenance. This paper focuses on the impact of Luminaire Dirt Depreciation (LDD), and demonstrates both the initial cost reduction and energy savings generated for a lighting system when regular luminaire cleaning cycles are implemented. Two typical luminaire types are evaluated within two common types of environments, for three cleaning cycles, for a representative office environment in two significantly different electric utility rate areas. The results clearly show that proper luminaire cleaning is a significant energy-saving "technology", and also identifies a trade off, in some cases, between economics and the conservation of energy and natural resources.
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