LED Savings Calculator
How much energy and money do you save by switching your bulbs to LED?
Result
Energy saved (kWh/year)
745
Money saved (per year)
148.92
How it works
An LED produces the same light as an incandescent bulb for about 85–90% less electricity: a 60 W incandescent is matched by a 9 W LED at around 800 lumens. The difference in watts, times your hours of use, is pure savings. Run the default numbers: ten bulbs switched from 60 W to 9 W, lit 4 hours a day, save about 745 kWh per year — roughly 149 in money at 0.20 per kWh, every year, for bulbs that also last 15–25 times longer than incandescents. The payback is usually a few months for frequently used fixtures. When buying, compare lumens (light output), not watts: around 800 lm replaces an old 60 W bulb, 1100 lm replaces 75 W. Less heat emitted is a bonus — both for safety and for cooling in hot climates.
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Frequently asked questions
How do I compare an LED with an old bulb?
Use lumens for light and watts for consumption: ≈800 lm matches an old 60 W incandescent and needs only ≈9 W in LED. Same light, a tenth of the power.
Do LEDs really last longer?
Yes — typically 15,000–25,000 hours versus about 1,000 for an incandescent. Fewer replacements add to the savings.
Is it worth replacing bulbs that still work?
For fixtures used daily, yes: the energy saved usually pays for the LED within months. For rarely used bulbs, replace them when they fail.
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