How this led lighting savings calculator works
Wattage reduction × bulb count × annual operating hours gives saved watt-hours. The calculator converts to kWh and multiplies by your electricity rate.
How to use it
- Number of bulbs. Enter the value that applies to your situation.
- Old bulb watts. Enter the value in W.
- LED watts. Enter the value in W.
- Hours per day. Enter the value in hours.
- Days per year. Enter the value in days.
- Electricity rate. Enter the value in $/kWh.
- Request the result. Add your email, then select “Email & show my result.”
What to do with the number
The result covers electricity only; bulb replacement frequency and purchase cost can make the total economic benefit larger or smaller. Compare bulbs by equivalent light output, not just wattage, so the lower-energy option still provides the brightness you need.
Planning estimate
Use this result as a starting point, not a guarantee. Product specifications, site conditions, manufacturer guidance, local codes, taxes, labor, tolerances, and rounding can change the real requirement or cost.