Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 480
ures of Street Lamps and Street Lighting—Including Both Those Which Have Been Adopted in Certain Instances and Others Which Have Been Proposed FROM Time to Ti.me. Measures based upon tests of lamps. 1. Unidirectional Light Intensity. Instances—2000-cp. for full arc indirection of maximum intensity,… … Fig. L—Showing the ineciuality of a system of unidirectional rating of street Umps. able specifications is felt more generallythan ever before and no one of thespecifications which has been proposedappears to meet with general acceptance. Measures of Illuminating Power WHICH have been PROPOSED. The…
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
