THE property possessed by certain discharges of radiating relatively large proportions of their energy in the visible part of the spectrum is well known. Thus efficiencies of the order of 50–70 lumens per watt are obtained from high pressure mercury vapour and sodium vapour discharges.
Fluorescent Lighting
Aircraft Engineering and Aerospace Technology ; 14 , 4 ; 112-116
1942-04-01
5 pages
Article (Journal)
Electronic Resource
English
Engineering Index Backfile | 1942
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