Due to global concern on climate change, renewable energy is also attracting both public and private investments to supply energy in Bangladesh as a developing country. Increasing the percent share of total energy produced from renewable energy is vital for achieving a sustainable energy growth. In this research paper, a PV(photovoltaics) solar system has been designed for the purpose of street lighting at Shahjalal University of Science and Technology (SUST), Sylhet, Bangladesh. The analyses for economic feasibility and greenhouse gas emission of the proposed solar street lighting system have been conducted using a clean energy management software namely ‘RETScreen’. For a project lifetime of 25 years, the equity payback period for the solar PV system is found to be as low as 13.6 years. The internal rate of return (IRR), net present value (NPV), benefit cost ratio (BCR) and annual life cycle savings are found to be about 7%, BDT 35690, 2.6 and BDT 1430, respectively. As a result, it can be concluded that the implementation of the solar PV systems is economically viable. Moreover, a total reduction of 11.42 tons of CO2 emission per year is expected from replacing fossil fuel based electric energy which indicates a great environmental impact for the better world.