Economic and Environmental Analysis of Converting Grid Supplied HPS Lights to solar PV powered LEDs in Street Lighting at Khairpur Mirs’ Pakistan

Economic growth is an important factor for the development of any country and mainly it is affected by the energy crises available. Pakistan is among the countries facing the energy threats and shortages. This paper contributes towards reduction of energy crises by moving towards renewable energy resources. The objective of the paper is to utilize the solar energy in replacement of conventional energy resources focusing the street lighting systems. Economic and environmental analysis is made for the replacement of 250W High Pressure Sodium lights with solar powered lights at khairpur Mir’s Sindh, Pakistan. For economic analysis, initial cost, energy consumption cost and maintenance cost of both lighting systems are explored while the environmental analysis is carried out by investigating the carbon emission for both of the systems. In addition to this, simple payback period and internal rate of return are also explored for economic analysis. Resultant data obtained from both types of lighting systems is compared with each other to highlight the effectiveness of solar LED lights. Presented analysis shows the attractiveness of solar powered LED lights in the street lighting systems as the government of Pakistan will be saving more than seventy million rupees in 25 years and more than 13 metric tons of carbon emissions are avoided. The results obtained from the study (economic and environment) reflects towards the implementation of such systems utilizing the naturally available resources in the countries like Pakistan. Based on the data, method and results presented such analysis could be done for different areas for different renewable energy sources available in different countries.