Personal Lighting Conditions to Obtain More Evidence in Light Effect Studies

Abstract

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The importance of including position and viewing direction when measuring and assessing the lighting conditions of office workers

“…With these types of discussions underway, the overall purpose of this literature review is to gain greater insight into the measurement methodologies in light and alertness studies currently in use. As some work here has already been done, we present this review of the literature as an extension of an earlier published review [10].…”

“…In addition to describing each study in sufficient detail, it is also recommended that researchers measure exact lighting conditions as comprehensively and precisely as possible to assure valid outcomes [9]. Yet, this is not always done properly: lighting conditions are often not measured continuously, and they are frequently reported as average values (i.e., averaged over time or over locations) [10]. Since all effects of light influence individuals in a particular space, the lit environment needs to be analysed at the individual level as well.…”

Personal lighting conditions of office workers: An exploratory field study

“…It is highly recommended to include personal lighting conditions in light effect studies. 9 4.2 Interpretation of personal lighting conditions Even though this study only included participants from one office building and it was only performed in spring 2017, still large individual differences in personal lighting conditions were found. These individual differences in personal lighting conditions may be caused by fixed personal characteristics (e.g.…”

“…Since the relationship between light and effects beyond vision, besides light quantity and spectrum, may depend on the timing and duration of light exposure, it is recommended to include continuous measurements of light exposure throughout a light effect study. 9 Many studies have been performed in controlled environments whereas the lighting conditions before and after the experiment may be equally relevant. 10 Normal patterns of light exposure people receive are usually dissimilar to the lighting conditions participants receive in a controlled lab study.…”