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Fluorescent Bulbs: The preference in using incandescent or fluorescent bulbs, or both, for Lighting any one room, depends upon the specific problem involved. A room entirely lighted by fluorescent tubes may appear cold and uninviting, because of the absence of red and yellow rays; and if such an appearance is undesirable, it may be counteracted by using one of the colored varieties. Fluorescent light is extensively used for dramatic effects in both residential and commercial installations, and it is particularly valuable for Lighting general areas rather than specific spots. It has a tendency to distort colors because of its cold quality; therefore Lighting engineers do not advise its use where food is prepared, or in women's Bath or powder rooms where make-up is applied. Incandescent light is not as adaptable as fluorescent, but is used to better advantage in rooms that are decorated in any of the historic styles and for spot Lighting and portable lamps. The initial cost of properly installed fluorescent Lighting is considerably more than that of a comparable incandescent installation, but operating costs are lower, and the life of the fluorescent tube is longer than that of an incandescent bulb.
Electric bulbs and tubes. There are two classes of electrically producedm light in general use today. The most Cross-section of two types of coves using fluorescent tube lights.
common is the incandescent filament bulb that, according to its size, gives a glow of varying degrees of intensity. The basic principle of this light has undergone only minor changes since its original invention; technical improvements, innovations, and size variations, however, have been introduced to provide greater efficiency; it is used for both spot and flood illumination. Three-way bulbs are also available, providing different strengths of Lighting from the same bulb at the option of the operator. The incandescent lamp produces warm yellow rays of light, except when the bulb is of colored glass.
The second most usual light source is the fluorescent tube, which consists of translucent glass filled with a gas that becomes luminous when used as a conductor of electricity, and which produces a very small amount of heat. The glass tubes are furnished in a variety of straight lengths, from 6 inches to 8 feet, and are from % inch to 2 inches in diameter, each size consuming a different amount of current. Ring and other shapes are also manufactured, and various colors are available.
The preference in using incandescent or fluorescent bulbs, or both, for Lighting any one room, depends upon the specific problem involved. A room entirely lighted by fluorescent tubes may appear cold and uninviting, because of the absence of red and yellow rays; and if such an appearance is undesirable, it may be counteracted by using one of the colored varieties. Fluorescent light is extensively used for dramatic effects in both residential and commercial installations, and it is particularly valuable for Lighting general areas rather than specific spots. It has a tendency to distort colors because of its cold quality; therefore Lighting engineers do not advise its use where food is prepared, or in women's Bath or powder rooms where make-up is applied. Incandescent light is not as adaptable as fluorescent, but is used to better advantage in rooms that are decorated in any of the historic styles and for spot Lighting and portable lamps. The initial cost of properly installed fluorescent Lighting is considerably more than that of a comparable incandescent installation, but operating costs are lower, and the life of the fluorescent tube is longer than that of an incandescent bulb.
Methods of lighting. Types of electrical Lighting are classified by the manner in which the light rays are directed to the object to be illumined. These are direct, indirect, and semidirect. Direct Lighting is the type that a section of cove for installation over windows and doors or around the entire perimeter of a room.
Fluorescent lights Most people opt for a gentle, restful form of Lighting in a bathroom, which makes fluorescent tubes an unlikely first choice. However, fluorescent tubes mounted behind translucent panels in the ceiling or, indeed, a Wall can add a touch of style and panache. Bear in mind that several evenly spaced low-voltage tubes produce a more flattering light than a fewer number of high-voltage tubes. Another advantage of fluorescent tubes is that they produce virtually no heat, making them a safe form of Lighting to position near water. |
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