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Light tubes or light pipes are physical structures used for transporting or distributing natural or artificial light for the purpose of illumination, and are examples of optical waveguides. In their application to daylighting, they are also often called tubular daylighting devices, sun pipes, sun scopes, or daylight pipes. Light pipes may be divided into two broad categories: hollow structures that contain the light with a reflective lining, and transparent solids that contain the light by total internal reflection. Generally speaking, a light pipe or light tube may refer to: * a tube or pipe for ''transport'' of light to another location, minimizing the loss of light; * a transparent tube or pipe for ''distribution'' of light over its length, either for equidistribution along the entire length (see also sulfur lamp) or for controlled light leakage. Both have the purpose of lighting, for example in architecture. == Types == 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「light tube」の詳細全文を読む スポンサード リンク
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