What this result means
The estimate isolates electricity savings from reducing wattage while keeping the same number of bulbs and operating hours.
How the LED Energy Savings Calculator works
The calculation assumes identical daily operating hours. Actual savings depend on use and local electricity prices.
The calculator does not fetch live prices or rates. That is intentional: you provide the tariff, price, rate or cost that actually applies to your situation, which makes the assumptions visible and avoids presenting stale market data as current.
How to get a more useful estimate
- Compare bulbs that provide a similar light output, usually using lumens rather than wattage alone.
- If lights are used different amounts, group them by usage pattern for a better estimate.
- Add bulb purchase cost separately if you want to estimate payback time.
Scenario check
To turn energy savings into a purchase decision, compare the annual saving with the extra cost of the replacement bulbs and expected lifetimes. If bulbs are replaced anyway, only the incremental purchase cost may matter. Light quality, compatibility with dimmers and fixture heat limits are also separate from the electricity saving shown here.
Important limitations
- Bulb purchase prices and replacement frequency are excluded.
- Savings are zero if the new wattage is not lower than the old wattage.
- Actual operating hours can vary by season and occupancy.
Frequently asked questions
Why compare lumens as well as watts?
Lumens describe light output. A lower-watt bulb can save energy only if it still provides the amount of light you need.
Does the calculator include bulb cost?
No. It estimates electricity savings only.
Can LEDs reduce cooling costs too?
LEDs release less heat than many older bulbs, which can reduce cooling load slightly, but that secondary effect is not included here.