Lighting Cost Calculator (LED vs Incandescent)
Compare yearly lighting cost and savings for the whole house.
Result
Formula
Calculation logicFrequently asked questions
How much do LEDs save?
A 9W LED replaces a 60W incandescent at the same brightness, cutting lighting energy about 85 percent.
How do I compute lighting cost?
Total bulb watts times hours per day times 365 divided by 1,000 gives annual kWh. Multiply by your rate.
Do LEDs last longer?
Rated 15,000 to 25,000 hours versus 1,000 for incandescents, so replacement cost also collapses.
What color temperature should I pick?
2700K is warm white for living rooms; 4000 to 5000K suits kitchens and garages. Brightness is lumens, not watts.
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