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Not many but it depends on the specific design! Look on its own label, either on the lamp or the supplier's packing.

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12y ago

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How much energy does a nightlight consume and how much does it cost to run it all day?

It depends if you use a newer LED, or older incandescent bulb style.The old bulb style (still popular, and usually cheaper to buy) use about 7 watts.If you use that for 8 hours, you would use 56 watt-hours. For a year that would be about 20.5 kWh (kilowatt-hour).An LED style light may be 1/4 watt, which works out to be .73 kWh. per year.How much that cost depends on where you live, and what rate you pay. 10 cents an kWh is a reasonable approximation for the United States. At that rate, the Bulb light would cost about $2 a year, and the LED would cost 7 cents.If you leave the light on all the time (in a dark bathroom) triple these numbers. The bulb style would be $6 and the LED about 20 cents. You can see that although the LED light is more expensive up front, it could pay for itself in energy savings in about a year. But neither light will cost that much to run.NOT MUCH, I would say A penny or less A day.....a different (cost and environmental) perspective - although the answers above are correct, for small devices using cost always gives answers that seem tiny. For 2 reasons we should get away from this approach: (1) lots and lots of small items add up to a lot; individually they might be small but if that means we ignore all small costs they soon add up. (2) think carbon - 20kWhrs is about 20kg of carbon dioxide (say 45 lb) a year - that's about 13 cubic metres of greenhouse gas just for a nightlight!


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

$40.00 a year


How much does it cost to run 350 watt oxygen concentrator per hour?

It depends on your location.


How much does a 400 watt hps light cost to run?

The cost to run a 400 watt HPS light will depend on your electricity rate. On average, running a 400 watt HPS light for 1 hour will cost around $0.06 to $0.12. To calculate the monthly cost, multiply the hourly cost by the number of hours the light is on each day, then multiply by 30 days.


How much does it cost to run a 5 watts transformer?

If the transformer uses 5 watts per hour you need to know what you are paying per 1000 watts from your power company. If you pay lets say $3.00 for 1000 watts then when your transformer burns 1000 watts it cost you $3.00 your cost will be $3.00 for 200 hours run time.