Electricity usage of an Incandescent Light Bulb

An incandescent light bulb also known as an incandescent lamp is an electric light with a wire filament which produces light when current passes through it. Incandescent lighting is cheap to produce but is very inefficient, converting only 5% of the energy into light.

Click calculate to find out the electricity cost of a single incandescent light bulb running at 60 Watts for 5 hours a day @ $0.10 per a kWh, keep in mind you can edit the numbers in the calculator.

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Hours Used Per Day: Enter how many hours the device is being used on average per a day, if the power consumption is lower than 1 hour per a day enter as a decimal. (For example: 30 minutes per a day is 0.5)
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Price (kWh): Enter the cost you are paying on average per a kilowatt hour, average price in North America is 10 cents. To find an exact price check your electricity bill or take a look at Global Electricity Prices.

Incandescent light bulbs have an average lifespan of 1000 hours or 41.6 days running 24/7. While comparable CFL light bulbs last an average of 9,000 hours or 375 days running 24/7 and an LED light bulb lasts 50,000 hours or 2,083 days. Incandescent light bulbs use the most energy from the 3 technologies, we highly recommend you take a look at the CFL light bulb calculator to see what a huge cost and energy saving difference switching to CFL or LED lighting can make.


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