Detecting and evaluating flicker from lighting ...

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11th International Symposium on Human Factors in Organisational Design and Management (ODAM 2014) CPH Conference

Detecting and evaluating flicker from lighting systems during field assessments of lighting installations
Paper
Author:Werner OSTERHAUS (Lighting Design Research Laboratory, Department of Engineering, Aarhus University, Denmark)
Sophie STOFFER (Lighting Design Research Laboratory, Department of Engineering, Aarhus University, Denmark)
Inger ERHARDTSEN (Esbensen Consulting Engineers (DEM), Denmark)
Date: 2014-08-18     Track: F - Tools & methods     Session: F3 - Quality improvement
DOI:10.4122/dtu:2336

This paper provides guidance to practitioners in visual ergonomics and lighting design, as well as lighting specifiers and installers, on how to detect flicker during field surveys of lighting systems and avoid flicker in lighting system upgrades or retrofits. Flicker has been identified as a problem in several lighting installations in different building types. A common perception is that LED lighting systems are flicker-free. Measurements indicate that LED sources can produce as much flicker as fluorescent lamps with magnetic ballasts. While flicker might be invisible to the human eye, it can easily be detected with very simple instruments available to most; namely mobile phones.