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
Typical home energy cost is 10 cents per kilowatt hour A 60 watt bulb running for one hour uses 60 watt hours .10 X (60/1000) = .006 cents per hour 16.66 60watt bulbs on for one hour would cost 10 cents.
1 kilowatt-hour is 1000 watt-hours and 60 watt bulb consume during 1 hour 60 watt-hours of electricity, so then it costs 0.6 cent =>60/1000=0,06*price of 1 kilowatt-hour = 0.6 cent
A 100 w light bulb uses one tenth of a kilowatt of power, therefore in 1 hour it uses one tenth of a kilowatt-hour of energy, that is 0.1 units, or 1.5 p.
Almost twice as much as 100 is almost twice 60.
A 0 Watt bulb does not consume electric power so the cost is zero.
The bulb uses 7.5 watt-hours each hour, or 90 watt-hours if left on for 12 hours. 1 unit of electricity would be used in 11 days at 12 hours per day.
ahm...depends on the cost per watt charged by your local provider... how much is it?
Using a 7 watt bulb for 1 hour would cost about 0.84 cents based on the average electricity rate in the United States. Over a year, if used for 4 hours a day, it would cost around $12.25 in electricity.
To calculate the cost per hour to use a 150 watt light bulb, you would first need to know your electricity rate per kilowatt-hour (kWh). Once you have that, you can convert the wattage of the light bulb to kilowatts (0.150 kW) and multiply it by the electricity rate to determine the cost per hour. Keep in mind that rates vary depending on your location and energy provider.
$40.00 a year
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.
You have to pay for the work (enegy) of 150 watt hours. Scroll down to related links and look at "watt-hour - Wikipedia".