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.
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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 per day for a night light
Not many but it depends on the specific design! Look on its own label, either on the lamp or the supplier's packing.
energy consume by the bulb = P*time =100*6 wh =.6 kwhour=0.6 unit energy consume by the bulb = P*time =100*6 wh =.6 kwhour=0.6 unit
after eating an apple you consume a lot of energy if it would fall out off a tree you would consume more energy if you drop it from a small tree then it does not have as much energy as if you drop it from a big tree.
By energy you mean watt hours. So the equation is watts x hours = 1680 watt hrs. Or stated in Kilowatts it would be 1.68 kw hrs. Average cost in USA would be about 18 cents.
OVER 9000!
a nightlight can cost a few dollars depending on the type of nightlight it is such as a bulb or sensor. the decor of the nightlight can be factored in the cost as well.
Energy; -15
22%
4,000,001
The question is too vague to answer.
When buying a portable air conditioner, you should worry about how much energy in which they consume. Seen as they are DC, they will not consumer as much as say an AC air conditioner which is powered from the mains.
Not many but it depends on the specific design! Look on its own label, either on the lamp or the supplier's packing.
It has to use alot of energy
The term "energy gap" is used in two different ways. First, it refers to diet, which is what people consume and what they need to consume to survive. Secondly, it refers on how much a country consumes and how much it produces.
Yes a baby can sleep with a nightlight without awakening. It does, however, depend on how much of a light sleeper the baby is, since all babies are different. But generally, a nightlight should not be a problem as the light is soothing and not blinding like the ceiling lights.
Joules (energy) are not equivalent to Watts (power).If something converts 6 Joules every second, it is 6 Watts. If it takes ten seconds to convert 6 Joules, its power is 0.6 Watts.Multiply the Watts by the seconds to find the Joules.CommentYou do not 'consume' power. Power is simply a rate; you cannot consume a rate! You consume energy; the rate at which you consume it is power.
it will cost like 1000 dallars