Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 405
t. Opposite these data the general appear-ance and distribution of light from thesingle unit are shown, thus enabling theillumination under the lamp withlocal lighting to be also readily calculated. The booklet contains a table of illu-mination values for various classes ofwork. We notice that a… … Intensive (I) Type Reflectors. Photometric Curve. ~ -. . - Lamp alone Lanip with Reflector. Particulars of Holophane Intensive Reflectors for Industrial Lighting. GAS LAMP LOWERING GEAR. We notice that the London ElectricFirm, of Croydon, are making a patentlowering gear suitable for use with…
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
