75 watts
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The bulb's power, 75 watts, is the power it uses continuously all the time it is switched on.
The energy it uses can be measured in watt-seconds (Joules) or in watt-hours. A 75 watt bulb uses 75 watt-hours each hour, which is 0.075 kilowatt-hour.
A 75 watt bulb uses 75 watts of power per hour. The unit of power is already per hour, so there is no need to multiply by hours separately.
75 watts * 1 hour = 270 kilojoules (standard SI unit of energy)
However electrical energy is general measured in kilowatt*hours (kWh) which is obviously 0.075 kWh
A 60 watt bulb used for 1 hour consumes 0.06 kWh (60 watts * 1 hour / 1000).
2300 watt-hours for every hour it operates. Watts x Hours = watt hours.
A 32-watt fluorescent bulb, when used for 1 hour, will consume 0.032 kWh (32 watts ÷ 1000). The energy consumption can be calculated by multiplying the wattage by the number of hours used.
98.7
A 60 watt light bulb uses 60 watts of power in a period of one hour or 60 watts in one minute or 60 watts in one second or 60 watts during any period of time.How much total energy a 60 watt light bulb "consumes", which is the amount of electricity that has to be paid-for, is measured in watt•hours (that's watts times hours). So a 60 watt bulb consumes 60 watt•hours in one hour, or 60 Wh x 24 hr/day = 1440 Wh per day.That is the same as 1.44 kilowatt•hours (kWh), so, if you look up what your electricity supplier charges for 1 kWh you can figure out how much it would cost you in money. If 1 kWh costs you 25 cents, then leaving a 60 watt light bulb switched on for 24 hours straight would cost you 1.44 kWh x 25¢/kWh = 36 cents.