The Rwandan State-run Energy Water and Sanitation Authority Company (EWSA) is rapidly increasing the number of population having access to electrical power energy. 30% of electrical energy is used in lighting. The incandescent bulbs, compact fluorescent lamp bulbs as well as fluorescent tubes are mostly used to convert electrical energy into light. The said light sources have many disadvantages such as excessive power consumption leading to giant bills of electricity, short life span leading to continuous replacement of lamps, and emission of CO2. Application of light-emitting diode (LED) lamps in lighting in long term suppresses the aforementioned problems resulting into saving of money that will be used for running new small investments.
 D. Silverman, “Comparing CO2 Pollution Using Heat from Incandescent Light Bulbs versus a Gas Heater,” 2012. http://sites.uci.edu/energyobserver/2012/01/10/comparing-co2-pollution-using-heat-from-incandescent-light-bulbs-versus-a-gas-heater/
 M. Yamada and D. Chwastyk, “Adoption of Light-Emitt ing Diodes in Common Lighting Applications,” Solid State Lighting Program Building Technologies Office of Energy Efficiency and Renewable Energy, US Department of Energy, 2013, pp. 9-16.
 National Bank of Rwanda, “Exchange Rates in Rwanda,” 2013. http://220.127.116.11:8081/
 Eartheasy Solutions for Sustainable living, “LED light bulbs: Comparison Chats,” 2013.
 M. A. Myer, M. L. Paget and R. D. Lingard, “Perform ance of T12 and T8 Fluorescent Lamps and Troffers and LED Linear Replacement Lamps,” Pacific Northwest Na tional Laboratory Richland, Washington, 2009, pp. 2-7.