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Answered 2009-05-20 17:05:49

An incandescent bulb is 96% efficient as a heater, and 4% efficient as a source of light. A fluorescent bulb is only 60% efficient as a heater, and 40% efficient as a source of light. An LED bulb is only 10-20% efficient as a heater, and 80-90% efficient as a source of light (but that light is usually unidirectionally directed... harder to do diffuse lighting with them).


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An energy efficient light bulb will use less energy than a normla light bulb; this means it produces less heat (heat is usually an unwanted byproduct of producing light).

A light bulb produces heat and light. A more efficient bulb produces more light and less heat.

It is the Incandescent light bulb. Most of the energy are lost as heat

The most efficient outdoor light bulb would the 5 watt Light emitting Diode light bulb also know as the LED bulb. They are small lights with miniature sockets or made to fit into conventional sockets.

there are 100 joules in an energy efficient light bulb 75 joules go towards the light and 25 joules go towards the heat

Fluorescent is more efficient. Incandescent bulbs should not be used any more, except for some special purposes (mainly where they keep something warm).

Energy efficient light bulb saves half of energy consumed by a regular bulb, although it has a lower range light compare to the high energy consumer bulbs.

It is about 5 times more efficient than the incandescent bulb, in other words for the same light a fluorescent uses one fifth the electric power.

small, cost efficient light bulb.

LED light bulbs are more energy efficient, environment friendly, and provide you more savings.

An incandescent bulb is not very efficient so it uses more power.

An example of an energy efficient device includes an energy efficient light bulb.

about 10% the filament light bulbs give off about 90% heat and 10% light

The incandescant light is more of a heat bulb than a light bulb, being 200% less efficient (on average) in producing the same amount of light (measured in lumens) than a fluorescent bulb. That being said, the light bulb would be considered part of a luminaire.

A fluorescent light bulb contains a gas which produces UV light when it comes in contact with electricity. Contrary to a normal light bulb this does not create any heat and is far more energy efficient.

It would be more different since it will take up more power than the less efficient light bulb. Instead of using all the solar power it will probably need the forces of 2 energies to light the bulb.

Florescent light-bulbs CFL Compact Fluorescent Lamp

A typical 20-watt compact fluorescent light bulb can produce about as much light as a 100-watt incandescent light bulb. There is an 80 per cent improvement in efficiency.

The energy efficient light bulb costs several times as much as the normal (incandescent) light bulb. The exact prices may vary from region to region. In any case, the extra cost will be more than compensated by savings in electrical energy, over the lifetime of the bulb.

Two; one to throw away the incandescent light bulb and spit on it and the other to run to the store and buy a 100% efficient bulb

The job of a light bulb is to convert electrical energy into visible light energy. (Not ALL of the electrical energy a bulb uses is converted to light energy. Their efficiency is quite low. An incandescent light bulb is more efficient as a heater than as a source of visible light. Fortunately, our eyes are very sensitive.)

Efficiency is typically associated with minimizing losses in a circuit. If you have no load you couldn't compute efficiency. If there is a load you need to determine what you are trying to measure. For example, in an incandescent light bulb a lot of power is wasted in heat. So if light is what you are looking for an incandescent bulb isn't very efficient. A compact fluorescent would be more efficient. However, if you were using a light bulb to power an "Easy Bake" oven it would be more efficient.

If you're using it to generate light, 10 percent efficient. If you're using it to generate heat, 90 percent efficient.

Light bulbs have become more efficient, meaning they use much less power.

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