Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 321
ve purposes. The distribution curves of thelamps with the reflectors are of direct use in calculations of illum- 285 22 ELECTRIC LIGHTING ination. Figs. 12 to 19 inclusive are typical of the distributioncurves of incandescent lamp units. Mean Spherical Candle=Power. When comparing lamps whichgive… … 260 270 £dOFig. IG. Horizontal Distribution Curve of a Mazda Lamp instead. By mean spherical candle-power is meant a mean valueof the light taken in all directions. The methods for determiningthis will be taken up under Photometry. The mean hemisphericalcandle-power has reference, usually, to the…
Electrical engineering
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