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An ordinary incandescent light bulb puts out a good bit of light as well as a lot of heat - both useful forms of energy. Except that one uses a light bulb for the light. The heat is secondary and most often not desired. It can cause the room where used to be too warm and require more air conditioning to be cooled to be comfortable.
Incandescent light bulbs can be rated as low as several milliwatts at low voltages to provide a small amount of light - as one would find on a radio dial from 50 to almost 100 years ago. They can also be several hundred watts, as would be use to light up a stadium.
The energy out put in light of newer lights, such as compact florescent lights and LEDs are much better than incandescent bulbs and their heat output is much less - they're more efficient.
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∙ 10y ago
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What are the types of energy produced by a burning light bulb?
Light , which is useful Heat , which is NOT useful.
Is a light bulb an output device?
It can be.
What is the source of energy in a light bulb?
Electricity is the source of energy in a light bulb.
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.
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 useful energy comes out of a light bulb?
light energy
Why does energy saver give more light than electric bulb of same watt?
Both bulbs output the same amount of energy. The difference is in how much of that energy is output as heat vs the energy output as light. In a standard incandescent light bulb about 10% of the energy is output as light while the other 90% is output as heat. This makes the bulb only 10% efficient. For a florescent bulb the output of light is about 50% and the other 50% is output in heat. This means that a fluorescent bulb outputs five times as much light for the same wattage as a standard incandescent bulb, hence you can get the equivalent of 100 watts of light output for only 20 watts of electricity.
If electrical energy goes into a light bulb what useful energy comes out?
The useful energy that comes out is light energy. Heat energy is also produced but is not useful
What are the types of energy produced by a burning light bulb?
Light , which is useful Heat , which is NOT useful.
What are examples of useful energy?
tv light bulb
Why is a low energy light bulb described as more efficient than a normal light bulb?
Because efficiency is measured in Output/input. At the same light bulb output, one with lesser energy input required is higher in efficiency. Possible confusion come from description of low energy light bulb without stated the high or low energy is compared at what lux it can produce light.
What is the input or output of the light bulb?
Input to light bulb is Electricity and output is light.
How is the light bulb a useful invention?
The light bulb is useful because it lights up places!
Can you use an energy saving light bulb in a light fitting with a light sensor?
yes as long as the sockets match up and it is not a high output light fixture
Is a light bulb an output device?
It can be.
What is the effiency of 60watt bulb run on a 100joule?
"60 watts" means "60 joules every second". That's what a '60 watt' bulb is designed to consume. If you put 100 joules of energy into a light bulb, 100 joules of energy are going to come out of it, one way or another. Either that energy will be converted into light and heat by the bulb's filament, or else it won't get consumed at all, and it'll come out the other side of the bulb and still be available for use in some other device. So, comparing output energy to input energy is not an effective way to evaluate the efficiency of a light bulb. What you need to do, in order to compare the economy and effectiveness of light bulbs, is to compare LIGHT output to input ENERGY.
How is bulb useful?
it's useful for light and safety.
