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How much energy does a 250watt bulb use per hour How much energy does the average light bulb use per hour?
Wiki User
∙ 9y ago
There are many factors that go into calculating the energy usage of a light bulb. The wattage printed on the lamp is only the energy use of the lamp when it is new. Depending on the kind of lamp he energy required to run it will increase as it ages. For example a Metal Halide lamp can use up to 50% more power in the last 20% of its life.
Another factor is the ballast that may be required to run the lamp. Each ballast has a "ballast factor" which can increase or reduce the overall energy usage of the lamp. Many ballasts have a factor as high as 1.2 which would increase the energy consumption of the lamp to 300 watts.
Answer
The question is asking about energy, not power as per the previous answer. To find the energy consumed by a lamp, or any device come to that, multiply its power rating by the time for which it is used. So a 250-W lamp will use 250 W.h (watt hours) of energy in one hour, 500 W.h in two hours, and so on. Energy is more-commonly expressed in kilowatt hours, for the purpose of billing however, where 250 W.h corresponds to 0.25 kW.h, etc
Answer: In an hour it uses 250 watt-hours. The average bulb probably uses 20-60 watt-hours each hour.
Wiki User
∙ 9y ago
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What is the least efficient kind of light bulb?
It is the Incandescent light bulb. Most of the energy are lost as heat
Is a light bulb a mechanical energy?
No. It converts electrical energy into light and thermal energy only.
Is it correct to say that an incandescent bulb and a light stick use the same form of energy to create light Why or why not?
No. One is chemical energy, the other is electrical energy.
Why is the light bulb not a closed system?
it is a closed system. no matter or energy flows across the boundary
What happens to the energy wasted in a light bulb?
electircal or photo electrical energy. Photons are shot across from panel to another panel this sparking back and forth creates the light you see.Answer: Electricity is the energy input into a light bulb. It either heats afilamanet to produce heat and light, r excites the gas contained in the bulb (in flluorescent tube) to emit visible light directly or emit UV light which interacts with a phosphor coating in the tubes to emit light.
Do you need a ballast for a 250watt sodium bulb?
yes
Can you use a 250watt Red Heat Bulb to simulate indoor sun at night?
no
What transformations occur in a light bulb?
In a light bulb, electrical energy is transformed into light energy and heat energy.
What is the source of energy in a light bulb?
Electricity is the source of energy in a light bulb.
What is most of the energy produced by a light bulb?
Most of the energy in a light bulb is heat energy.
When energy runs through a light bulb what kind of energy does the light bulb produce?
A light bulb uses electrical energy, and produces light, as well as heat.
What energy occurs in the light bulb?
light and heat energy occur in a light bulb when it is turned on.
What energy transformation occurs in a bulb?
In a light bulb, electrical energy is transformed into light energy and heat energy.
Is a light bulb an example og electromagnetic energy?
A light bulb is not an example of electromagnetic energy, but the light which the bulb gives off is an example of electromagnetic energy.
When the light bulb is lit electrical energy is changed into light energy and?
When lighting a light bulb, it is changed into light and heat/thermal energy.
How is light bulb a form of energy?
A light bulb IS not a form of energy, it CONVERTS energy. A lightbulb converts electricity into heat and visible light.
What type of energy is when you plug in a light bulb?
To plug it in, you use your muscle energy. When current flows through the bulb,electrical energy converted to the heat and light energy in the bulb.
