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Abstract

In an evaluation of other LED retrofit programs an average return on investment (ROI) of 3.3 years was found for interior lighting and average of 6 years for exterior lighting. To maximize returns our group focused on three buildings that were chosen based on UGA’s office of sustainability priority lists. The three buildings include Miller Plant Science, Davison Life Sciences, and Conner Hall. Take-offs of lighting fixtures were done on each building showing total fixtures in Miller life science to be 2274, 1093 for Conner Hall and 2930 for Davison Life Sciences. With Conner hall having the least amount of fixtures it is recommended to start the retrofit there over the summer while there will be less students. The estimated time for completion is about 273 hours or about 7 weeks at 40 hour work weeks for one installer. It is recommended to have 4 man crews to reduce this to about two weeks. Miller life sciences is recommended to start next with an estimated completion time of 570 total man hours. Finally, Davison Life Sciences is estimated to take a total of 730 man hours.

The cost analysis for each building was found by including the price per unit and labor time to install each fixture along with taxes. An initial investment for Conner Hall, Miller, and Davison are $116,326, $243,237, and $313,010 respectively. The return on investment was calculated using a net present value and came out to a total $656,351 for all buildings in five years. This investment will start turning a profit after and will be at $2,083,166 in ten years; $3,638,565 in fifteen years; and $4,721,109 in twenty years.

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