Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 30
is needed and isembodied in modern types of reflectors. (2) The heat generated in the half-wattlamp is exceptionally great, partly owingto the larger volume of energy concen-trated in a given space, and partly to thefact that the gaseous contents of the bulbconduct the heat very readily to sur- THE… … (b) Ball fitting with Semi-indirect fittingover reflector. witii ornamental bowl.
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
