As the compact florescent light bulb has began to quickly replace the aging incandescent light bulb in recent years, another sort of bulb is emerging which will replace them both. The light emitting diode (LED) bulb has advantages that make it a superior technology.
While the incandescent bulb produces light inside a vacuum and the compact florescent bulb does so inside a tube, the LED is referred to as solid-state lighting. It is solid state since it makes use of solid matter, a semiconductor, to produce light.
The semiconductor consists of both a positively and negatively charged component. The positive layer has small openings for the free electrons from the negative element to go through. When an electric charge is applied to the semiconductor, a circulation of excited electrons moving through the holes emits a light.
The two great advantages of LED light bulbs are their long life and energy efficiency. They only utilize almost one tenth as much electricity as usual bulbs and therefore offer big savings in energy costs as well as a decreased carbon footprint. This actually makes them both cost effective and eco friendly.
Their solid state structure and really low heat emissions give them a much longer lifespan. LED light bulbs greatly outlast even compact florescent bulbs and can easily last for a decade or much longer in regular use. This not only saves on the cost of the bulb, but it additionally saves time and replacement costs. A lot better suited to survive rough handling and outside conditions, a LED light bulb can be relied on to work when needed most.
Since they reach their full brightness nearly immediately and are in fact mercury free, LEDs solve 2 main problems that compact fluorescent bulbs have (mercury content and lag time in reaching full brightness).
LED light bulbs are designed to emit a very directional light so the light could be aimed precisely where it is required. Additionally, their light is closer to the color of daylight, which studies indicate helps people stay alert.
Until recent changes in the technology, the construction of the LED induced much of the light to be trapped inside. This in addition to the bluish light they typically emitted brought on a dimmer light that made LEDs unattractive for home use.
LEDs are now much brighter though and can emit exactly the same soft, white light regular bulbs do.
One downside with LEDs that has not been corrected yet is cost. While their power savings and really long life mean LEDs are cost-effective and save money in the long run, they are unlikely to achieve mass consumer acceptance until their costs come more consistent with other sorts of bulbs. Although their costs are coming down, LED light bulbs are still comparatively costly.
Once their costs come down more, LEDs are likely to become the standard and dominate lighting unless a greater technology appears.
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