Subjective Assessment of Light Environment Quality based on Human-centric Lighting

Abstract

The light environment quality, in general, can be assessed from various metrics of that have been made by standard institutions such as the Indonesian National Standard (SNI), Illuminating Engineering Society (IES), or the International WELL Building Institute. However, the development of research in the field of lighting has shifted from focusing on visual quality and energy to Human-Centric Lighting (HCL). HCL requires an assessment metric to measure quality from the subjective point of view of occupants. There are two types of subjective judgments in light environment quality research, that are subjective judgments for post-experiment conditions and subjective judgments for pre & post-experiment conditions. Subjective assessment of the light environment quality based on Human-centric Lighting can be divided into three categories, that are visual, emotional and biological assessments. For the subjective assessment instrument of the visual category, researchers can use the glare sensation assessment standard. Meanwhile, for the assessment of the light environment quality from the emotional category, there is no specific standard. And for assessing the light environment quality from the biological category, researchers can use commonly used assessment standards, such as the Karolinska Sleepiness Scale (KSS), Pittsburgh Sleep Quality Index (PSQI), and Epworth Sleepiness Scale (ESS). For an assessment category that does not have a standard, the researcher can arrange a research instrument from the results of the literature review and adapt it to the conditions of the research study object.