Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 264
amps the protection from glare maybe inadequate. The RLM reflector now describedis intended to combine the advantagesof both types. It provides (a) a durableand efficient reflecting surface ; (b) a * The RLM Standard Reflector for In-dustrial Lighting, by Ward Harrison (Trans.111. Eng. Soc, U.S.A.,… … General view of RLM Reflector. As a means of making tests on this andother reflectors the author described aninteresting device termed a reflectorphotometer. The photometer has aconcave reflecting surface of plaster ofParis in the centre of which is mounted aconcentrated filament miniature…
Lighting
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