Welcome to the Base Electrics LED return on investment calculator. This tool is designed to give an indication of payback times when switching your lighting to LED solutions.

This calculator gives an indication of payback time, the annual and life-time power, CO₂ and maintenance savings when you upgrade your lighting to LED solutions with Base Electrics.  Enter the wattage and life for both the old and new fixture and the billing rate per kilowatt-hour.  Be sure to include all costs, i.e. labor, parts, inventory, travel, fuel, equipment, etc.  Light levels are NOT calculated or suggested8

1. Compute kilowatts (kW) saved by upgrading to LED technology: Original Fixture Wattage + Ballast   LED Wattage   Watts Saved per Fixture   # of Fixtures to Replace   Watts Saved Watts -  Watts = 160 Watts × = 8000 W 8  kW   2. Compute kilowatt hours (kWh) saved and tons of CO2 production saved annually. Kilowatts Saved   Hours of Use per Day   Days of Use per Week   Weeks of Use per Year   Annual savings: 8 kW × × × = 29120.00 kWh   = 24.75 Tons 3. Compute power cost savings per year. of CO2 production * kWh Saved per Year   Cost Per kWh (typically £0.10)      Annual    Savings   29120.00 × £ = £2912.00      4. Compute power cost savings and saved CO2 production over life of the LEDs. Replacement LED Life (hours)   Hours per Year Usage   LED Est. Life   Annual Power Cost Savings   Lifetime Power Cost Savings  Hr  ÷  3640.00 hr/yr  =  13.74 Years  ×  £2912.00  =  £40000.00 LED lifetime CO2 savings *   = 340.06 Tons 5. Compute payback from power cost savings. NOTE:  LED Cost is the amount used to calculate payback.  It may be the direct cost if retrofit, or may be the cost difference between the LED and the fixture it substitutes if a new installation.  This entry should include all installation costs.     (Enter LED Cost)   Payback From Power Savings = LED Cost, or Diff. between LED & Original = £ × 50 Lights = 3.78 Years Power Cost Savings per Year £2912.00   6. Compute maintenance savings during life of the LEDs. Include labor, equipment, fuel, parts, inventory, etc. LED Life (hours)   Original Fixture Life (hours)   # of Fixtures   Maint Labor Original Fixture   Maint. Parts Original Fixture   Lifetime Savings 50000 ÷ × 50 × ( £  + £   ) = £26041.67 7. Compute the amortized changeout cost savings per year. Total Lifetime Replacement Cost Savings Lifetime of Replacement Fixture Total Amortized Savings per Year £26041.67 ÷ 13.74 Years  = £1895.32   Simple Payback on Power Consumption And Maintenance Costs = Initial Cost of Upgrade = £ 220  × 50 = 2.29  Years Power + Maintenance Cost Savings £ 4807.32