90 watt 120 volt bulb?

I have a 90 watt 120 volt bulb. If it burns 12 hours a day for 2 years how much energy and roughly what is the cost?

Answers:
The voltage is irrelevant since you know the wattage which is the product of voltage and current. You pay for power (Watts) over a time period.

Get calculator: 1/2 a day for 2 yrs = all day for 1 yr. Find the number of watts consumed in one day (2,160W) and multiply by 365 days (788,400W). That's the wattage used in one year. Divide by 1000 to convert to KWh (788.4). Multiply that by the KWh rate in your area. At 10 cents ($0.10) per KWh your total would be $78.84

Other answers:
in order for anyone to solve this they will need to know how much your energy costs....it varies state to state and town to town. It will be less than if you used the very popular 100 watt bulb.
in order for anyone to solve this they will need to know how much your energy costs....it varies state to state and town to town. It will be less than if you used the very popular 100 watt bulb.
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