Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Flicker Explained : guide to IEC for the lighting industry

Lindén, Johannes LU orcid and Dam-Hansen, Carsten (2022)
Abstract
Flicker, or more precisely temporal light modulation (TLM), has re-emerged as a problem with the introduction of LED-based lighting technology. TLM, meaning variations in light intensity over time, may have negative effects on human health, causing annoyance, headaches, eyestrain and migraine. In addition to the unnecessary suffering TLM causes in individuals, the negative consequences of TLM create an obstacle to broad and rapid adaptation of the new LED-technology and consequently also an obstacle to potential energy savings.

This guide gives an introduction to TLM, what it is and how it is measured. The effect of TLM on health is concluded, and also the state of knowledge in its research area. An extended part of this guide... (More)
Flicker, or more precisely temporal light modulation (TLM), has re-emerged as a problem with the introduction of LED-based lighting technology. TLM, meaning variations in light intensity over time, may have negative effects on human health, causing annoyance, headaches, eyestrain and migraine. In addition to the unnecessary suffering TLM causes in individuals, the negative consequences of TLM create an obstacle to broad and rapid adaptation of the new LED-technology and consequently also an obstacle to potential energy savings.

This guide gives an introduction to TLM, what it is and how it is measured. The effect of TLM on health is concluded, and also the state of knowledge in its research area. An extended part of this guide discusses the flicker measure short-term flicker indicator, Pst, and the technical report describing it, TR IEC 61547-1:2020 (henceforth referred to as IEC 61547, unless otherwise stated). This report describes the equipment, method and measures required to assess flicker. It is, however, technically complicated and could be very hard to interpret by non-technical readers. For a more detailed investigation and recommended amendments of the IEC 61547, see “Flicker explained – Interpretation of the Technical Report IEC 61547“ which is another product of the project Flicker Explained. For a general guide on TLM measurements, please consult the technical note published by International Commission on Illumination, CIE TN 012:2012. (Less)
Please use this url to cite or link to this publication:
author
and
organization
publishing date
type
Book/Report
publication status
published
subject
keywords
Flicker, Temporal light modulation, TLM, LED-technology, Flimmer, Temporal ljusmodulering, TLM, LED-teknologi
pages
16 pages
ISBN
978-91-8039-522-9
978-91-8039-523-6
project
Flicker Explained – to ensure the new EU ecodesign regulations on temporal light modulation for good lighting and health
language
English
LU publication?
yes
additional info
This work has been supported by the Swedish Energy Agency and conducted in collaboration between Lund University and the Technical University of Denmark (DTU).
id
45350eb8-8ce5-4018-aa0f-c15f1d4a06e7
date added to LUP
2023-02-17 14:36:29
date last changed
2023-06-17 03:00:17
@techreport{45350eb8-8ce5-4018-aa0f-c15f1d4a06e7,
  abstract     = {{Flicker, or more precisely temporal light modulation (TLM), has re-emerged as a problem with the introduction of LED-based lighting technology. TLM, meaning variations in light intensity over time, may have negative effects on human health, causing annoyance, headaches, eyestrain and migraine. In addition to the unnecessary suffering TLM causes in individuals, the negative consequences of TLM create an obstacle to broad and rapid adaptation of the new LED-technology and consequently also an obstacle to potential energy savings.<br/><br/>This guide gives an introduction to TLM, what it is and how it is measured. The effect of TLM on health is concluded, and also the state of knowledge in its research area. An extended part of this guide discusses the flicker measure short-term flicker indicator, Pst, and the technical report describing it, TR IEC 61547-1:2020 (henceforth referred to as IEC 61547, unless otherwise stated). This report describes the equipment, method and measures required to assess flicker. It is, however, technically complicated and could be very hard to interpret by non-technical readers. For a more detailed investigation and recommended amendments of the IEC 61547, see “Flicker explained – Interpretation of the Technical Report IEC 61547“ which is another product of the project Flicker Explained. For a general guide on TLM measurements, please consult the technical note published by International Commission on Illumination, CIE TN 012:2012.}},
  author       = {{Lindén, Johannes and Dam-Hansen, Carsten}},
  isbn         = {{978-91-8039-522-9}},
  keywords     = {{Flicker; Temporal light modulation; TLM; LED-technology; Flimmer; Temporal ljusmodulering; TLM; LED-teknologi}},
  language     = {{eng}},
  month        = {{12}},
  title        = {{Flicker Explained : guide to IEC for the lighting industry}},
  url          = {{https://lup.lub.lu.se/search/files/138163143/Flicker_explained_Guide_to_industry_EN_digital.pdf}},
  year         = {{2022}},
}