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How much energy does a nightlight use compared to a 100 watt bulb?
Wiki User
∙ 6y ago
An incandescent nightlight bulb is either 4 watt or 7 watt.
A 4 watt bulb uses 1/25th (0.04) the power of a 100 watt bulb.
A 7 watt bulb uses 7/100th (0.07) the power of a 100 watt bulb.
There are LED and other types of nightlights that use much less power than this.
To find the energy total used multiply the power (in watts) by the total time the light is on (in hours) to get energy (in Wh). If you want kWh divide this by 1000 as a watt is 1/1000th of a kW.
Wiki User
∙ 6y ago
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How much does night light cost?
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.
Does the life of a light bulb depend on its wattage?
Yes, Of Course The lifetime depends on the wattage. The wattage is the amount of Power the light bulb uses, and the life time depends on the power. Thank you
What are energy efficient light bulbs?
A Low energy bulbs uses about 1/5 energy of a traditional bulb. ie. 20w (Low energy bulb) = 100w (standard filiment bulb) 80%+ traditional bulb s' energy is lost as heat. The 20% figure shown above only relates to the low energy bulb during its normal usage. The question was about the overall ecological balance, which includes ecological burden through manufacture, distribution and disposal (or recycling). Low energy light bulbs contain heavy metals, electronics and toxic materials, and are manufactured (and recycled) using much more complicated and, presumably, more ecologically damaging processes compared to those involved in traditional tungsten filaments. The question is still open thus.
How much money do you save by using a 20 Watt Compact Fluorescent over an incandescent bulb?
An Energy Star qualified compact fluorescent light bulb can save you around $30 over it's lifetime, paying for its self in about 6 months.
How does a person's level of physical activity affect his or her daily energy needs?
If a person exercises for 2-3 hours a day, he would require more energy compared to a guy who doesn't exercise. This is because. the more exercise/physical activity you do, the increased amount of energy you use. Therefore, your body would need to replenish that used energy. This is done by increasing his/hers daily energy needs. A person who doesn't exercise would have a lower energy need as they don't use that much energy compared to an athlete.
How much does night light cost?
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.
How much energy does a normal light-bulb make in comparison to a colored one?
They are the same light bulb, so they are the same. The colored bulb has coloring applies on its outside surface. They do not make energy, they use energy.
How much better or worse is nuclear energy?
Compared to what?
Does the life of a light bulb depend on its wattage?
Yes, Of Course The lifetime depends on the wattage. The wattage is the amount of Power the light bulb uses, and the life time depends on the power. Thank you
In a 60 watt light bulb how much energy is converted into heat?
What are the uses of Heat energy
How much of the electrical energy used to light an incandescent bulb is converted into light energy?
About 2 %.
Different color light bulb affect how much energy it has?
No, Colored light bulbs holds the same amount of energy a regular light bulb holds.
Can a baby sleep with a nightlight without awakening?
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.
How much energy does a 5 watt light bulb use off?
A lot
What do you need to know to calculate how much energy light bulb uses?
You should be able to read the power off the bulb or its packaging.
What is the time duration of a 9 volts battery using 5 volts bulb?
The light-bulb will probably burn out if you connect it directly. Other than that, you CAN'T calculate the time duration based on the data provided. The duration depends on how much energy the light-bulb uses, and how much energy the batter is able to store. Voltage is NOT a unit of energy.
When 60 W means that W joules of energy are transferred into the bulb each second. In use how much energy is given out by the bulb each second?
The light bulb will use electrical energy at the rate of 60 W (60 J/s), and it will emit that energy, also at the rate of 60 W.Note that in any real light bulb, only part of the energy is emitted as visible light. The remainder is mainly heat.
