LED Lighting Savings Calculator

Use the calculator & graph below to calculate the return on investment (ROI) payback period for installing LED lights. The general rule of thumb is that it is worth replacing any light that is used for more than 2 hours a day.

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LED Light Light being
Input values
  Number of lights
  Average hours of use per day
  Power cost, $ per kWh
  Light wattage (W)
  Purchase cost per bulb ($)
  Average Bulb lifetime in years
Output values
  Power consumption per year (kWh)
  CO2 saved per year (kg)
  Running cost per year
  Total cost over 1 year
  Total cost over 3 years
  Total cost over 5 years
  Total cost over 10 years


Return On Investment Graph


Assumptions & Notes


Related Pages


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