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Pre-Retrofit Lighting Study at the University of Texas at Arlington
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In the summer of 1993 the University of Texas at Arlington Physical Plant Department submitted a request to the Energy Systems Lab to conduct a lighting study to determine the most cost-effective method of implementing energy-saving lighting retrofits in U.T. Arlington classrooms without compromising the Illuminating Engineering Society (IES) recommended minimum lighting levels. A preliminary series of field tests was undertaken to get a sampling of classroom lighting levels on the U.T. Arlington campus and to determine whether lamp locations within the fixture would impact the amount of light output. This was followed by a series of lab tests conducted at the Energy Systems Lab, located on the Texas A&M University campus, to compare the light output of fixtures with different combinations of lamp types and locations within the fixture. In order to evaluate the impact of the proposed lighting retrofit, a study was made to determine the capital investment required as weighed against energy cost savings. The results of the study are presented in the paper and a summary table is provided to take into account lamp and ballast performance compared with capital expenditure with respect to meeting IES minimum footcandle levels. Based on the report findings it was recommended that a full, comprehensive survey be undertaken at UTA, to ensure that minimum lighting levels will be maintained, while also ensuring that the capital investment is the most cost-effective.
Houcek, J. K.; Claridge, D. E.; Haberl, J. S. (1994). Pre-Retrofit Lighting Study at the University of Texas at Arlington. Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu). Available electronically from