Led stands for Light Emitting Diodes. LED light bulbs are made up of a number of diodes and do not have a filament but give out light by means of the movement of electrons. In comparison with an incandescent bulb it is more useful since it has a longer life span and it has a lower consumption of energy.
There are coloured LED light bulbs and Led light bulbs that are white. When it is coloured light that is needed the LED light bulbs of that particular colour are used without the need for a filter. However when white light is needed coloured LED light bulbs are used with a filter so as to end up with white light.
Incandescent lights use a filament that gets heated up when the light switch is put on. The filament needs to be heated to emit light. This leads to much light energy being lost. The other problem is that when the bulb is switched on and off many times the life of the bulb is affected. This is not so in the case of LED light bulbs. The LED light bulbs do not have a filament and come on as soon as the switch is turned on due to this the LED light bulbs does not waste any energy and the life span of the bulb is not affected. Because the LED light bulbs do not generate much heat most of its energy goes into producing light.
When they were first introduced LED light bulbs were considered to be an expensive item. Today the price has been considerably lowered and although the incandescent bulbs are lower, in the long run the LED light bulbs are the cheaper option. The LED light bulbs last longer, almost double that of an incandescent bulb, and replacement time is longer and the need to buy bulbs is reduced. If one is to work out the cost per hour of the bulb they would find that the expensive LED bulb would be cheaper in the long run.
There are many uses for LED light bulbs. In the home they could be used as lights for a bicycle. They could also be used for solar powered lights for the garden and the walkways. Where agriculture is concerned they could be used to enable the growth of plants. The light emitted for the LED light bulbs is useful for the process of photosynthesis and being of low heat it will not damage the plants. On the highway LED light bulbs have been used for traffic lights. For celebrations you can now get a string of holiday lights made up of LED light bulbs.
The greatest advantage of the LED lights is that it is mercury free. This makes it an environment friendly bulb.
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