Delphi study for the development of an integrative lighting labeling system.

PATTINI, ANDREA E.; RODRIGUEZ ROBERTO GERMÁN; RUIZ VERÓNICA JIMENA

Zurich

Conferencia; "Inside / Out" Daylight in Sustainable Urban Design Conference ? 2023; 2023

This research endeavors to identify indicators and methodologies for evaluating integrative lighting in indoor workplaces, focusing on characterization, evaluation, certification, and accreditation. Conducted through an online three-stage Delphi study, the research involved reaching consensus on descriptors (SI), indicators (SII), and weighting of descriptors and indicators (SIII). This paper specifically presents the outcomes of SI and SII. In SI, five dimensions of integrative lighting (Visual Performance, Visual Comfort, Vista, Control, Vitality) were established using the Ergonomic Lighting Indicator (ELI) method. The agreed-upon descriptors were then categorized in SII as either VISUAL/PHOTOMETRIC or TEMPORAL/HUMAN FACTORS descriptors. Stage I included 32 experts. Four Visual Performance descriptors exceeded consensus thresholds, while two Vista descriptors did not meet them. All experts highlighted the importance of flicker for Visual Comfort, and circadian cycle stabilization emerged as a crucial Vitality descriptor. Basic aspects of lighting control gained consensus in the Control dimension. In SII, 23 experts participated. Regarding VISUAL/PHOTOMETRIC descriptors, there was agreement on measuring at the specific plane of the visual task. Consensus existed on using validated subjective instruments and luminance meters to assess physiological and discomfort glare. For TEMPORAL/HUMAN FACTORS, experts recommended measuring at specific times under a dynamic lighting paradigm. Most experts advocated considering both age and preferences when evaluating daylighting and illuminance levels, with age being the primary consideration for assessing disability glare. These findings contribute to a comprehensive framework for evaluating integrative lighting solutions in indoor workplaces, offering potential enhancements to the real estate appraisal process.