Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 525
ratioof illumination in different parts of theroom the same. It appears that in orderto get exactly the same effect theabsolute values of the illuminationshould be identical. Otherwise theimpression received by the eye does notseem natural. Some ingenious experiments in thisdirection are described… … Fig. 2.—Siction of reflector illuminated byconcealed lights and designed co imitatethe light from a window. observed that the screen in front of thi.slight blocks out the direct rays andso that the eye cannot see the source,but allows a large part of the light to THE ILLUMINATING ENGINEER 511…
Lighting
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