LED Savings Calculator
See what switching from incandescent or halogen bulbs to LEDs saves you each year, and how quickly the new bulbs pay for themselves.
Your results
Worked example
Ten 60 W incandescent bulbs replaced by 9 W LEDs, used 3 hours a day at $0.15 per kWh:
- Wattage saved: 10 × (60 − 9) = 510 W, or 0.51 kW
- Energy saved: 0.51 kW × 3 h × 365 days = 558.45 kWh per year
- Money saved: 558.45 × $0.15 = $83.77 per year
- Old cost $98.55 a year, LED cost $14.78 a year
- Payback: the bulbs cost $20 extra in total, and $20 ÷ $83.77 per year is about 2.9 months
How this calculator works
Savings are the difference between the old and new yearly kWh, multiplied by your rate. Payback is the total extra bulb cost divided by the yearly savings.
Common questions
How long do LEDs actually last?
Most LED bulbs are rated for 15,000 to 25,000 hours, versus about 1,000 hours for an incandescent. At 3 hours a day, that is roughly 14 to 23 years, so replacement savings add up on top of the energy savings shown here.
What rate should I use?
Use the all-in rate from your electricity bill (energy plus delivery and fees, divided by kWh used). Time-of-use customers in Ontario can use a blended rate near $0.15 as a starting point.
Estimates only. Results are provided for planning purposes and are based on the figures and assumptions shown on this page. Actual savings vary with your rate plan, usage, and bulb prices. Mississippi Maple accepts no liability for purchase decisions made using this calculator.