Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 281
at the Faraday House TestingLaboratory the illumination under thepip of an ordinary straight filament tungsten lamp was increased 33J timesby the use of one of these reflectors.One quality which this reflecting surfaceappears to possess is the elimination ofstriations from the lamp… … Type E. lite (i.e.. opal glass bulb) gasfilled lamps.The inner surface of the reflector is sobrightly illuminated as to become almostindistinguishable from the actual bulb.We were also pleased to observe that themajority of these reflectors are so designedthat the lower rim comes well below thepip…
Lighting
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