Economic analysis and energy consumption approaches for lighting improvement of government building facilities

This paper discusses the conversion of fluorescent tube lamp to LED tube lamp in terms of economic analysis point of view. This research was conducted for several brands of the lamp, namely Philips fluorescent tube, Goolite LED tube, and Philips LED tube. Each lamp brand totaling five pieces were tested in the workspace at Research Centre for Electrical Power and Mechatronics — Indonesian Institute of Sciences. The methodology of this research is to measure the lumen, voltage, current, and power factor of each type of lamp. Furthermore, an economic analysis of fluorescent and LED tube was carried out by comparing the amount of electricity cost toward the electricity cost savings. The variable of a lifetime, investment cost, and the amount of electric energy consumed are used as electricity saving variable. From the test results, it is obtained that a smaller electric power consumption about 50%, the light of LED tube lamps emit 17.36–33.84% brighter than fluorescent tube lamps. Regarding the cost, although the price of LED tube lamp is 4–6 times higher than fluorescent tube lamp, it gives 48.64–55.87% electricity cost savings. The electricity cost savings for LED tube lamp is due to 50–60% more energy efficient and 2–3 times longer lifetime compared to fluorescent tube lamp. It can be concluded that as a replacement of fluorescent tube lamp, the use of LED tube lamp for lighting in a government building is very profitable.