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watts divided by voltage = amps

40watts divided by 230 voltage (uk) =0.17 amps

I suspect you are really asking what electricity will you have to pay for. Energy companies charge for Kilowatt hours (1 KWH = 1000 watts running for 1 hour). So a 40 W bulb running for 25 hours consumes 40 x 25 = 1000W = 1KWH. In 1 hour it consumes 40W x 1H = 40 WH = 0.04KWH

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How much does it cost to run a 70watt light bulb for 1 hour?

Assuming an electricity rate of $0.12 per kilowatt-hour, running a 70-watt light bulb for 1 hour would cost $0.0084 or 0.84 cents. This calculation is done by converting watts to kilowatts (70W = 0.07 kW) and then multiplying by the cost per kilowatt-hour.


How much does it cost to run a 12V bulb?

The cost of electricity varies from country to country and between suppliers. Consumers can also have different tariffs so that it is cheaper to use electricity at times when others are not using it. There is, therefore, no simple answer.


Can you run a 200 watt bulb with a 160 watt solar panel?

Yes, a 160 watt solar panel can power a 200 watt bulb, but only during optimal conditions. You may not get continuous power output if there are factors like shade or weather conditions affecting the panel's efficiency. It's recommended to use a battery to store excess energy for use when the sun is not shining.


How much does one watt of energy cost?

Energy suppliers of electricity and natural gas will give you a cost per kilowatthour, and your usage is metered. With coal you buy it by the ton, so you need to know how many BTU that grade of coal will give per ton. With oil, the energy content of that type of petroleum product should be available from the supplier, per gallon or 100 gallons probably. You would have to keep a check on how much you are using over a period.


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Related Questions

How much does it cost to run a 150 watt halogen bulb?

$40.00 a year


How much does it cost to run a 60 watt light bulb for 15 minutes?

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How much would it cost to run a 15 watt bulb non-stop for one year?

To calculate the cost of running a 15 watt bulb non-stop for a year, you first need to determine the cost of electricity per kilowatt-hour (kWh) in your area. Once you have that information, you can use the formula (Wattage/1000) x Hours Used x Days in a Year x Cost per kWh to find the annual cost. If the cost of electricity is $0.12 per kWh, running a 15 watt bulb non-stop for a year would cost approximately $15.79.


How much does it cost to run a 100 watt bulb per hour?

That bulb is 100 watts or 0.1 kilowatts so it uses 0.1 kilowatt-hour of energy each hour, which costs about £0.015


How much does it cost in cents to run a 60 watt light bulb?

In 100 hours it will use 6 kilowatt-hours (units) of electrical energywhich would cost around £1 or $1.


How much does it cost to run a 100 watt led bulb for 10 hrs a day?

To calculate the cost of running a 100-watt LED bulb for 10 hours a day, first determine the energy consumed: 100 watts x 10 hours = 1,000 watt-hours or 1 kilowatt-hour (kWh). If the cost of electricity is, for example, $0.12 per kWh, then running the bulb would cost about $0.12 per day. Over a month, this would amount to approximately $3.60.


How much does a 9 watt led light bulb cost to run?

The average for america is about 18 cents per kilo-watt hour, 0.18, multiplied by the 9 watts it consumes, 0.009 because we are using KILO-watt hours, to give you a grand total of: 0.162 Cents per hour to run


How much does it cost to run a 7 watt bulb non-stop for a month?

Approximately 5 kilowatt hours. Check your electric bill to see what you are charged per kilowatt hour.


How much does it cost to run a 1000 watt light?

About 7 cents an hour.


How much does it cost to run a 1000 watt light bulb in 24 hours?

The cost to run a 1000 watt light bulb for 24 hours is dependent on your electricity rate. Assuming an average rate of $0.12 per kilowatt-hour, it would cost $12 to run the light for 24 hours (1000 watts = 1 kilowatt).


Can you run a 50 watt halide bulb on a 100 watt halide ballast?

No, it is not recommended to run a 50 watt halide bulb on a 100 watt halide ballast. The ballast should match the wattage of the bulb to ensure proper operation and to avoid potential damage to the bulb and ballast. It is best to use a ballast that is rated for the wattage of the bulb being used.