A new approach to interior lighting design: early stage research in Ireland

Current standards for interior lighting design are discussed and an alternative design methodology proposed. Cuttle has previously suggested a new criterion be defined as perceived adequacy of illumination (PAI), and that the metric for specifying minimum illumination standards becomes mean room surface exitance (MRSE). This metric specifies the overall brightness of illumination, enabling its distribution to be planned in terms of target/ ambient illuminance ratio (TAIR). This new methodology is explained, analysed and discussed along with on-going research at the Dublin Institute of Technology.