Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 209
ed a form of industrialindirect lighting unit intended speciallyfor industrial use (the Icumfa unit). The unit is essentially an indirectfitting carrying its own ceiling in the formof a large steel reflector to redirect and diffuse the light. The lower half of thelamp-bulb is silvered, thus… … Fig. i. General view ot [cmnfa indirectfitting for industrial lighting. was hitherto impracticable owing to thedarkness of ceilings or the presence ofBkylights, rafter,-, or overhead gear. These units are made in two sizes, the24 in. for 150 and 200 watt, and the :}ll in.for 300 to 1,000 watt lamps…
Lighting
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