In ten hours, a 200W bulb will use: 10 * 200 = 2000 Watt-hours = 2 kwh
To calculate the kilowatt hours (kWh) used by a 30 watt light bulb in 8 hours, we first convert the power to kilowatts: 30 watts = 0.03 kilowatts. Then, multiply this by the time in hours: 0.03 kW * 8 hours = 0.24 kWh. So, 0.24 kWh are used to light a 30 watt light bulb in 8 hours.
A 100 W light uses a power of 0.1 kW all the time it's switched on, which means it uses 0.1 kWh each hour. So it uses 1 kWh in ten hours. In a month of 30 days totalling 720 hours, it would use 72 kWh of energy.
A 32 watt bulb uses 32 watt-hours, or 0.032 kWh, every hour it is used.
A 60 Watt light bulb consumes electrical energy. If you leave is on for 24 hours, it consumes 60 x 24 = 1440 Watt-Hours, or 1.44 Kilowatt-Hours. If you want to know how much money this much energy costs, look on your last electricity bill. There it will give the cost of one Kilowatt-Hour.
It consumes (actually "converts") 1.5 kW every hour it is on, equivalent to about 2 horsepower-hours, meaning you'd need two horses pulling simultaneously if you were to want to run that bulb all day.
To calculate the kilowatt hours (kWh) used by a 30 watt light bulb in 8 hours, we first convert the power to kilowatts: 30 watts = 0.03 kilowatts. Then, multiply this by the time in hours: 0.03 kW * 8 hours = 0.24 kWh. So, 0.24 kWh are used to light a 30 watt light bulb in 8 hours.
KWH stands for kilowatt hour, meaning a thousand watts used for an hour. In terms of, for example, the familiar 60 watt light bulb, you would need (just under) 17 such light bulbs operating for an hour to consume 1 KWH.
The amount of electricity a light bulb uses in a day depends on its wattage. For example, a 60-watt bulb used for 10 hours per day would consume 0.6 kilowatt-hours (kWh). You can calculate the electricity usage by multiplying the wattage of the bulb by the number of hours it's used, then dividing by 1000 to convert to kWh.
A kilowatt is 1,000 Watts. 30 Watts is equal to 0.03 kilowatts. A kWh or kilowatt-hour is the rate of electrical usage. It is a measure of kilowatts used per period of time (1 hour). 1 kWh is 1 kilowatt (1,000 watts) for 1 hour. So, multiply your 30 watts (0.03 kilowatts) by 1 hour to get kWh. =0.03 kWh In about 33 hours and 20 minutes, this lamp would use 1 kWh.
At 10 cents per kWh (Kilowatt hour), one 100 watt incandescent light bulb ran for 24 hours straight will cost 24 cents a day. $7.30 a month, $87.60 a year. kWh = (Watts Used * Hours per Day * Days per Month) / 1000 Cost per Month = kWh * Cost per kWh
A 32 watt bulb uses 32 watt-hours, or 0.032 kWh, every hour it is used.
A 100 W light uses a power of 0.1 kW all the time it's switched on, which means it uses 0.1 kWh each hour. So it uses 1 kWh in ten hours. In a month of 30 days totalling 720 hours, it would use 72 kWh of energy.
None. Light bulbs do not emit carbon dioxide. The electricity used to power the light bulb may have been produced by a method which emits carbon dioxide (then again, it may not have), but the bulb itself doesn't emit anything except heat and light.
To calculate the energy used by running a 15W fluorescent light bulb for 24 hours, you can use the formula: Energy (kWh) = Power (kW) x Time (hours). In this case, the energy consumption would be 0.36 kWh (15W x 24 hours / 1000).
A 0 Watt bulb does not consume electric power so the cost is zero.
A 60 Watt light bulb consumes electrical energy. If you leave is on for 24 hours, it consumes 60 x 24 = 1440 Watt-Hours, or 1.44 Kilowatt-Hours. If you want to know how much money this much energy costs, look on your last electricity bill. There it will give the cost of one Kilowatt-Hour.
40w=.04kWh.04*12 hours=.48 kWh