Effect of light on the drawing power of the show window

The practise of providing illumination in show windows during the evening hours has long been accepted by merchants as a successful method of promoting sales. However, in the past, there have been few data available which showed the magnitude of the drawing power of different levels of illumination. An investigation was therefore made to provide facts from which the actual value of poorly or brightly illuminated windows could be determined with a reasonable degree of accuracy. The results of this investigation are given in a paper “Effect of Light on the Drawing Power of the Show Window” by Walter Sturrock and J. M. Shute, presented at the annual convention of the Illuminating Engineering Society, September 1922, together with a detailed account of the method of carrying on the investigation and typical log sheets of individual tests.