The lighting of office buildings and drafting rooms / information compiled by A.L. Powell. (1920)
General Electric Company, Edison Lamp Works · General Electric Co., Edison Lamp Works · leaf 14
e requirements are even more exacting as the work is ofa higher grade and must be accurate. Semi-indirect systems wheredense glass is employed, or totally indirect systems are probablythe best suited, using from 1.5 to 3.5 watts per square foot. Direct general illumination of a high intensity using… … Fig. 9 A High Intensity of Illumination is Provided in This Drafting Room by 300-watt ClearEdison Mazda C Lamps in Deep Bowl, Dense, Opal, Inverted Reflectors. Thistype of illumination gives excellent diffusion and eliminates denseshadows The high intensity of lighting is most efficientand makes…
Lighting · Light bulbs · Light fixtures
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