9781334184437 - the illuminating engineer, vol. 10: jan. 1917 to dec. 1917 (classic reprint) de society, illuminating engineering (3 resultados)
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PAP. Condición: New. New Book. Shipped from UK. Established seller since 2000.
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Librería: PBShop.store UK, Fairford, GLOS, Reino UnidoPBShop.store UK
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PAP. Condición: New. New Book. Shipped from UK. Established seller since 2000.
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Librería: Forgotten Books, London, Reino UnidoForgotten Books
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Paperback. Condición: New. Print on Demand. In the early 20th century, with the advent of new forms of lighting and the development of new incandescent bulbs, the concept of the 'lumen' as a measure of the total light output from a source was proposed as a replacement for candlepower, the previous standard unit. This book explor…es the history, use, and application of the lumen. The author presents the arguments for the lumen as a measure of luminous power, examining how it provides a better representation of the total light output of a source than candlepower. The book also explains how the lumen can be used in practical lighting calculations, including how to determine the average illumination in a room and the efficiency of lighting fixtures. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.
