Number of lamps in installation
Lamp Type		50w Halogen	SAL LED
Cost per lamp
Total lamp cost
Lamp Wattage
Circuit consumption including driver (W) Driver assumed 80% efficient
Days per year
Hours per day
Hours per year
Total KWh consumed per year
CO2 emissions per year (Kg /year)
Total energy cost per year per Kw
LED Energy saving per year
Payback time in years

Energy price increase per year over 5 year period
Energy cost over 5 years
Number of lamp replacements
Cost of lamps (including initial purchase)
Cost of contractor to replace lamps
Cost of running for 5 years per lamp
CO2 saving by using SAL LED over 5 year period (Kg)
Cost saving by using SAL LED over 5 year period