San Francisco : Architect and Engineer, Inc · leaf 202
l cost $0,285 per lumen, or28.6% more. Carried out on a years basisthese figures have surprising significance. Frequently, accurate tests reveal that theuse of a more efficient fixture will permit theuse of smaller lamp sizes and still provide theillumination required. In such a case the… … Fig.5 ance of efficiency. Some types of fixtures willdepreciate less than others. Some are moreaccessible for janitorial servicing than others.Some do not require as frequent janitorial ser-vice. These facts must be ascertained beforethe decision Is made. hiaving completed the tests and…
Architecture · Building
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