Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 214
found to benegligible. (4) A Railway Boohing Hall lighted byTungsten Lamps in Prismatic (MassReflectors. Another example of lighting by tung-sten lamps with prismatic reflectors isafforded by the case of the railway book-ing hall shown in Fig. 11. At each pointthere is a 200-watt lamp with .shade,… … URCH UGHTinQ, FlQ.e This angle is 39° 10, giving an areaon the reference plane of approximately1700 square feet. 200 THE ILLUMINATING ENGINEER (april)
Lighting
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