Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 152
Give a horizontal illumination,and surface brightness in excess ofthe average value for the walls andother upright surroundings. (g) Give as far as possible anequivalent colour-value. SHADES AND REFLECTORS. 139 These are important points to bearin mind in connexion with all kinds ofshades, as their… … Fig. 24.—Showing gliadow-tester illuiiiiiKitud by iiuliiLct illumiuaticn. great. One crucial difficulty that direct stand, indirect, semi-indirect, and well- Sghting systems (otlier than local point shaded local ligliting, with a low value lighting) uieet with is the arrangement of general…
Lighting
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