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dimanche 4 mai 2014

Commercial Hanging Fluorescent Light Fixtures

By Eloise Hewitt


Since the 1930s, the goal of providing longer work hours in commercial and industrial locations has been met, at least in part by the development of larger, brighter and more economical light sources. Commercial hanging fluorescent light fixtures are more costly initially, but the lower operating cost makes them a choice which should be considered by commercial enterprises. Although the hanging fixtures are very utilitarian, they can also be designed in a way that is aesthetically pleasing.

As with any other lighting source, the main reason for using fluorescent bulbs is to provide illumination. With large open spaces, the source of the illumination is often this type of lighting fixture. The chains or cords are utilized to bring the fixture closer to the worker or customer's level. Illumination is the best way to make products look attractive and to improve the workspace of employees during night shifts.

Use of this type of lighting offers a number of advantages. For instance, they are the most energy efficient type when utilized in the interior of a space. They can also be utilized outdoors. The tubes are not expensive to produce. The ballast components are more expensive. Both the bulbs and the ballast are long-lasting. Colors are available in cool to warm white shades. The illumination is diffused, thus eliminating shadows and harsh glare.

Although there are similarities between cold cathode tubes and hot cathode tubes, there are differences as well. In addition to these two major categories of fixtures, there is a third type. Electroluminescent bulbs are different from the other types. All three types operate under the principle of phosphors which are acted upon by electrons.

Of the three main types of fluorescent lights, the hot cathode style is most commonly found. Usually, it consists of a long glass tube containing an inert gas (often argon). The gas is under low pressure. There is an electrode on either side of the tube, made of tungsten. The ballast controls and regulates the AC power input to the electrode. The standard size of the tubes is four feet. The illumination offered is 40 watts. In the past, ballast tended to be magnetic. Today they are usually electronic. Electronic ballast is less costly to produce and requires less material.

A cold cathode light resembles the hot cathode type, but has an interior coating, making it more suitable to produce free electrons, especially when the voltage is elevated. This type of tube was not considered to be a source of illumination originally. Like the hot cathode, it is contains gas and there is paired electrodes, one on each end.

The third type of lighting is EL (electroluminescent or high field electroluminescent lamps). In this style of fixture, electrical energy is converted into light and no heat is required in the process. Electrical current is transferred directly through phosphor in order to achieve the desired result.

Adding covers over the fixtures increases the aesthetic appeal. Opaque covers allow for diffusion of the lighting. The tendency for glare or strong shadows is limited. The size and shape of the lamps are fitted to the specific needs in the workplace or commercial space.




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