Design of the Visual Field as a Routine Method

The Method of Designed Appearance, which commences with the consideration of the appearance of the lighted interior and the specification of the luminances of the principal surfaces, has been applied to a simple rectangular interior. It is shown to lead to a very simple design procedure which can be reduced to a work sheet, one Table and one set of curves. Jones-Neidhart(6) ratios can be found immediately, whereby suitable equipment can be selected if these coefficients are available generally. The glare index can also be found immediately, whereby the installation can be checked for glare. The method in its simplest form is suitable for the straightforward cases and demands no specialised knowledge, but is capable of elaboration to any extent which the situation may justify. It is recommended that a code be prepared giving guidance on the specification and luminance factors in typical cases.