This thesis aims to evaluate the lighting efficiency of three Ohio University campus buildings. The primary research question is: What are the short- versus long-term costs and benefits to Ohio University of renovating the lighting systems of these older buildings? The research was conducted as a case study with examination of two subquestions: What types of lighting fixtures are currently being used and how efficient are they? How efficient can proposed lighting fixtures be? Results indicate that the cost of installing more energy-efficient lighting fixtures can be quickly recaptured in older buildings. With replacing the present lighting fixtures Ohio University would pay approximately 2.5 times less than it pays currently for the lighting utilities cost of the case study buildings. With these energy savings it would take 3 to 4 years to reclaim the money spent for reinstallation of the energy-efficient lighting fixtures.