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Satellite image of Canada. This link opens a new window. Office of Energy Efficiency - Commercial and Institutional Buildings.

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Simple Payback Calculator (Lighting)

Learn more about payback, and then use this calculator to determine how long it takes for an energy-efficient lighting measure to pay for itself.

A. units
B. $  $
Multiply A × B $ 0 Total Cost
Watts
Watts
C. Old wattage – new wattage ÷ 1000 0 kW saved
D. units
E: hours per day
F. days per week
G. weeks per year
H.   $
Multiply C through H $ 0 Annual Savings
 
Simple payback=Total cost ÷ Annual savings N/A years
 

 Date modified: 2005-09-15Back to top.Important noticesThis link opens a new window.