Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 148
giv^enheight, and determine how tlie lampsshould be spaced in order that the illu-mination over the room may bea])proximatply uniform. Some manu-facturers supply diagrams enablingtlie illumination to be calculated, andstate spacing rules for a given type ofreflector. Wlicn even illumination overa…
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
