Practical applied electricity; a book in plain English, for the practical man. Theory, practical applications and examples (1911)
Moreton, David Penn, 1882- · Chicago, The Reilly & Britton co · leaf 325
ease theintrinsic brilliancy and toreduce the glare, and in sodoing act as a shade orreflector. The arc lamp isusually enclosed in twoglobes when used for in-terior lighting, in order to reduce the intrinsic brilliancy. Thechange in shape of the distribution curve, shown in Fig. 251,due to the use… … Fig. 255 ELECTRIC LIGHTING 315 mately 15 feet by 15 feet, the color of the walls will haveconsiderable effect upon the general illumination when thelamps are used without shades or reflectors. The effectiveillumination in rooms with different colored walls is obtainedby multiplying the illumination…
Electrical engineering
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