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Choosing A Light BulbUntil a few years ago, energy was a good deal cheaper and few people thought of their light bulbs as being a major drain on their finances. Furthermore, there was only one kind available for most light fittings, the incandescent bulb, so you did not have much of a choice in the matter. The issue is more complex these days, as there are several competing lighting technologies that can be fitted into a standard light socket. The three main contenders are incandescents, LEDs, and CFLs, and each one has their own set of advantages and disadvantages, which we shall weigh up here. The oldest, and perhaps the most familiar type of bulb currently available is the incandescent bulb, which was invented way back in the 19th century. These work by passing an electrical current through a filament, heating it up until it produces light, inside a glass bulb which prevents oxygen from getting anywhere near the white hot filament, and thus prevents it from burning up. These bulbs are still the cheapest to buy, but the fact that they dissipate much of the energy required for the bulb as heat rather than light makes them very inefficient, and costly to run when compared to their modern rivals. Also, they do not last nearly as long, due to the extremes of temperature that the filament is exposed to over time. The most common type of bulb currently in use is the Compact Fluorescent variety, often referred to as energy-saving bulbs. These are usually only a little more expensive than incandescent bulbs, and are both a lot more energy efficient and long lasting, making them by far the most affordable type of lighting available. Although they require far less in the way of energy than incandescent bulbs, they do contain some quite toxic chemicals, and are more damaging to the environment when they are disposed of, which takes some of the shine off their environmental credentials. By far the most environmentally friendly type of light bulb currently available is the Light Emitting Diode, or LED. Although LEDs have been used as indicators in small electric circuits since the 1960s, it is only recently that this technology has advanced to the stage they have been made powerful enough to light a room with. LEDs are without a doubt the future of the light bulb, as they are a lot more energy efficient and long lasting than the much lauded energy saving CFLs, with none of the toxic by products associated with that technology. They are currently too expensive to be a mass market product, although this is expected to change over the next few years. At the moment, unless you have the funds to kit your house out with LEDs, CFLs remain the best buy, although you can expect this to change over the coming years. ...

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