Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 170
ntion to the properlocation of the lamp in the bowl (see Fig.34). It is of great importance that the glassbowls of semi-indirect fittings should beof sufficient density and give the greatestpossible diffusion with a minimum ofabsorption. Where bowls of thin lightglass are used the brilliancy of the… … $A Ligbt Density/ B He»»y Density Fig. 34.—Semi-indirect lighting fitting andpolar curve—500 watt lamp (1). For show window lighting the newlamp requires deep reflectors completelyhooding the lamp, and suspending thelamp in a vertical position (Fig. 36). Thisindicates an improvement on the…
Lighting
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