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Correspondence: on the state of knowledge concerning the effects of temporal light modulation

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.1177/1477153520959182
AuthorSearch for: 1ORCID identifier: https://orcid.org/0000-0003-3183-4537; Search for: ORCID identifier: https://orcid.org/0000-0002-2286-5991; Search for: ; Search for: ORCID identifier: https://orcid.org/0000-0001-7518-4025
Affiliation
  1. National Research Council Canada. Construction
FormatText, Article
Subjecttemporal light modulation; stroboscopic effect; lighting; light sources; perception
Abstract
Temporal light modulation (TLM) is a change in the luminous quantity or spectral distribution of light with respect to time of either a light source or a lighting system. These changes arise because of the device or system design, including drivers and control gear, and because of fluctuations in the electrical supply. In former times, families of lighting products all exhibited the same (or approximately the same) TLM characteristics: For example, AC-powered incandescent lamps shared the property of TLM in a sinusoidal wave at twice the mains frequency and 4%–10% modulation depth. T8 fluorescent lighting systems with electronic ballasts operated with a dominant frequency between 20 kHz and 40 kHz and little modulation depth. Previously, knowing the lighting technology provided sufficient information about the TLM properties of a lighting system; today, this is impossible without measuring the system directly.
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PublisherSage
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  • Lighting Research & Technology 53, no. 1: 89–92.
LanguageEnglish
Peer reviewedYes
NRC numberNRC-CONST-56407E
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Record identifierccab7502-6ec0-406d-99c3-f1f2880cd5c2
Record created2021-01-14
Record modified2021-01-14
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