Payback period was identified to become 1.01 years, which shows that the replacement of HPS lamps with LED lamps is an economically eye-catching selection. Frequently, projects having a payback of much less than 5 years are highly suggested; within this case, it’s just 1.01 years. Primarily based on sensitivity analysis taking into consideration varied prices of LED lamps and electrical energy expense, the authors very recommend the replacement of HPS lamps to LED lamps in regions together with the high expense of electricity as the discounted payback period is even less than a year. Even in locations with low electrical energy charges and high cost of LED lamps, it’s nevertheless economically feasible using a payback period less than three years. Additionally, replacing HPS lamps with LED lamps in a tiny streetlight program, as shown by this study, results in the reduction of 106.876 tonnes of CO2 emissions. This shows the higher significance of replacing energy-inefficient streetlight lamps with energy-efficient LED lamps to cut down millions of tonnes of CO2 emissions worldwide.Energies 2021, 14,21 ofThe second a part of the paper considers optimal sizing of PV/battery technique for any new streetlight program with LED lamps. Primarily based around the optimized sizes of panels/batteries, the life cycle cost of PV/battery technique essential to power the new streetlight technique extending a stretch of eight.55km is 81658. The price per kWh of generated energy is estimated to become 0.097 /kWh which proves that the method is economically feasible to be implemented in Oman exactly where the current energy expense is 0.078 /kWh. With rising cost of energy rates and decreasing the price of renewable power elements, the proposed methodology will prove to be a lot more promising and economically attractive besides minimizing the CO2 emissions to zero. To study the practicality of implementing energy-efficient approaches in street lighting system, neighborhood governments can adopt the presented methodology. This will depend on the geographic attributes of your place, availability/cost of LED lamp, expense of renewable energy components and electrical energy price. The methodology is complete and adoptable by any place, thinking about the several aspects existing within the selected area. More analysis is needed within the control side of LED lamps such as the housing and driver circuit with detailed evaluation of LED lamps. Clever streetlight systems taking into consideration light pollution and driver comfort is an additional technical aspect to be regarded as in the methodology for much more power savings and CO2 emission reduction.Author Contributions: Conceptualization, R.A.A. and R.G.A.; methodology, R.G.A.; application, R.G.A.; validation, R.A.A., A.M. in addition to a.A.-H.; formal evaluation, R.A.A., A.M., A.A.-H., R.G.A.; investigation, R.G.A., A.A.-H.; resources, R.G.A.; writing–original draft preparation, R.G.A.; writing– overview and editing, A.M., R.A.A., A.A.-H.; visualization, R.A.A., A.A.-H., A.M.; supervision, R.A.A., A.A.-H., A.M.; funding acquisition, R.A.A. All authors have read and agreed to the published version from the manuscript. Funding: The APC was funded by Sultan Qaboos University. Institutional Review Board Statement: Not Applicable. Informed Consent Statement: Not Applicable. Acknowledgments: The authors would prefer to thank the maintenance division of Sultan Qaboos GW-870086 manufacturer University, Oman, for supplying ADX71441 Autophagy sufficient data, which produced this function more practical. Conflicts of Interest: The authors declare no conflict of interest.NomenclatureEnergies 2021, 14,22 ofSSL HPS LED PCB PV CFL ROI NPV TR S E W CoU Mf LLD LD.