3-63: Decision scheme to determine lighting requirements for indoor environments

The TC will work on the definition of a decision scheme to determine lighting requirements for different visual tasks in indoor spaces, taking into account a wider set of variables with respect to those usually considered into national and international standards. The selection of lighting requirements is generally referred to the activities or visual tasks carried out in one or more zones of a building or room, however, several other aspects, task, context or subject related, can influence the lighting needs for visual performance and comfort, and should be taken into account for a more accurate definition of lighting design values and to achieve a more effective lighting design. 

The new method will be grounded on existing scientific and technical literature, that will be used to retrieve the fundamentals on which lighting design values are based, the main factors which affect human visual response to indoor lighting conditions and the way they affect it. 
Despite defining the method, the scope of the document is also to provide a demonstrative part to explain how the new decision scheme should be used and the results that are obtained. 

The TC will focus on the visual effects of light and on photometric requirements. The definition of lighting requirements for human health and well-being is out of the scope of this TC. Nonetheless, the methodological approach behind the decision scheme could be later considered also for the definition of a dynamic model to identify melanopic requirements for indoor spaces.