Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 344
this note issuitable for commercial work, especiallyin rooms where too much reliance mustnot be placed on the reflecting powerof the ceiling. It is sIiowti with a singlelamp, but is also adapted to clusters.The complete enclosure of the lampis doubtless a help in cleaning, alwaysan important point… … 330 THE ILLUMINATING ENGINEER (jtjxe)B.T.H. INDIRECT UNITS.
Lighting
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