Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 406
ble of withstandingpressure considerably in excess of thosehabitually used in gas lighting thearrangement should be quite a safeone. THE ILLUMINATING ENGINEER (sept.) 399 Engineering Data for Holophane Intensive Type Reflectors. Horizontal i. C.P 3cos „ lUumina tlon H-! D a 3 Cos a CP. h 0 0 1 00… … 4« 6 TS S lO^ . Horizontal Distance in feet (D). Curves A or B show the distribution of liglit from the respective units placed at a height of 10 feet.Curve C sliows the sum of these two units placed at 15 feet apart. The above data is calculated for lamps rated at 100 c p. To obtain values for…
Lighting
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