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Abstract

In March 2012, the Society of Light and Lighting (SLL) published a new edition of the Code for Lighting. This revision includes a number of changes, which are discussed in detail. Among these changes are a recommendation for mean cylindrical illuminance within enclosed spaces and increased room surface reflectances. A method has been proposed by others to perform in-field measurement of cylindrical illuminance without a dedicated meter. Research in a small test space is undertaken to validate this proposed methodology and comment on its accuracy and practicality. Using the same test space, room surface reflectances are altered to demonstrate their impact on the visual environment. The proposed method for recording cylindrical illuminance is found to be accurate, but tedious and time-consuming to implement. Room surface reflectances were increased and the effect on illuminance on surfaces, luminance, horizontal illuminance, cylindrical illuminance and modelling index was significant for the test room used.

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