Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 160
Fig. 5 is a more convenient modification.Both are suitable for gas or electricity. … Fig. 4. Cravaths Box Shade for Low LevelLighting, with Dense (ilass at back. Method C Overhead direct lighting from ceiling or roof. It may be con-centrated in a few units or distributedover many points. In overhead lighting we take a leafout of the text book of Nature. Suchlighting illumines the…
Lighting
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