Lated with an Excel sheet, as shown in Table 5. In Table five, A = 1, B = 346.86, and C = 30,121.742. The discounted payback period is calculated applying Equation (7) and is equal to 1.01 years. Resulting from fluctuating oil rates and because the availability and price tag of LED lamps varies from spot to place, the authors performed a sensitivity analysis with varied prices of electricity and LED lamp cost to check the financial feasibility of replacing HPS lamps with LED lamps. The outcomes of sensitivity analysis are presented in Figure 4.Energies 2021, 14,Energies 2021, 14, x FOR PEER REVIEW10 of11 of(a)(b)(c)Figure 4. Cont.Energies 2021, 14,Energies 2021, 14, x FOR PEER REVIEW11 of12 of(d)(e)(f)Figure four. Cont.Energies 2021, 14,Energies 2021, 14, x FOR PEER REVIEW12 of13 of(g)(h)Figure four. Effect of variedEffect of varied costs of electricity the discounted payback discounted payback period: (a) Figure 4. costs of electrical RMM-46 Data Sheet Energy and LED lamp on and LED lamp on the period: (a) Energy expense 0.05 /kWh (b) Energy expense 0.06 /kWh (c) Energy expense 0.078 /kWh (d) Power expense 0.09 /kWh (e) Energy expense 0.1 /kWh (f) Power Power expense 0.05 /kWh (b) Energy expense 0.06 /kWh (c) Energy expense 0.078 /kWh (d) Power cost cost 0.12 /kWh (g) Power cost 0.18 /kWh (h) Energy expense 0.23 /kWh.0.09 /kWh (e) Energy price 0.1 /kWh (f) Energy cost 0.12 /kWh (g) Power price 0.18 /kWh (h) Energy price 0.23 /kWh. in CO2 Emissions When the HPS Lamp Is Replaced with all the LED Lamp 5. ReductionIn Oman, 97.five of your electrical energy generated is from organic gas [39]. Based on the Table 5. Calculation of discounted payback period. Thegenerated from natural gas benefits in the emisInternational Energy Agency, electrical energy color shows the transition from damaging to optimistic worth along with the parameters per kWh of generated electrical energy [40]. In Oman, both the open-cycle sion of 400 g of CO2 chosen. gas turbine (OCGT), which has an efficiency of 30 , as well as the combined-cycle gas turbine Year Quantity Discounted Money Flow Cum.Sum (CCGT), with an efficiency of roughly 45 , are made use of. According to a seven-year statement of 0 -32,878.35 -32,878.35 energy generation in Oman by the -32,878.35 Oman Power and Water Procurement Organization [35], 1 35,134 32,531.48148 the CCGT generates 8390 MW, plus the OCGT generates 1945 -346.8685185 this, the reMW. Depending on two 35,134 30,121.74211 29,774.87359 duction in CO2 emissions is analyzed for the streetlight system under study, which is pre3 35,134 27,890.50196 57,665.37555 sented in Table 6. 4 35,134 25,824.53885 83,489.9144 The resulting AL-8810 Protocol reduction in CO2 emissions per year upon replacing the HPS lamp with 5 35,134 23,911.61004 107,401.5244 the LED lamp are going to be 106.876 tonnes, thus saving millions of dollars and big amounts of six emissions. 7 Payback= 1.Sensitivity evaluation shows that in regions with high electricity costs, it’s very encouraged to replace the energy-inefficient lamps with energy-efficient LED lamps, asEnergies 2021, 14,13 ofthe discounted payback period is quite brief. In regions where the electricity costs are low, it is still economically viable to replace the energy-inefficient HPS lamps with LED lamps, even with all the higher investment cost of LED lamps. Having a low electricity price tag of 0.05 /kWh and high expense of LED lamp ( 200 per lamp), the discounted payback was only 3 years, which proves the economic feasibility apart from the reduction of tonnes of CO2 emissions. 5. Reduction in CO2 Emissions When the HPS Lamp Is Replaced with the LED Lamp In Oman, 97.5 on the.