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Light and lighting (1908)
Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 540
Fig. 2.—Mazda 500-watt 100-volt lampin Lumino semi-indirect fitting. … Polar curve of Mazda half-watt lampin Alabas globe. 135* SO 165 180 165 ISO 135 QO IDS IOS 7& y\y iC. / / / 7~ 7S° ^-A 4 5 ^3 1P~ / •4E* QO IS c T IB 30 Distribution of light from Lumino semi-indirect fitting.Lighting
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