Document Type
Article
Publication Date
4-2024
Abstract
Concerns have been raised about the possibility of effects from exposure to short wavelength light (SWL), defined here as 380-550 nm, on human health. The spectral sensitivity of the human circadian timing system peaks at around 480 nm, much shorter than the peak sensitivity of daytime vision (i.e., 555 nm). Some experimental studies have demonstrated effects on the circadian timing system and on sleep from SWL exposure, especially when SWL exposure occurs in the evening or at night. The International Commission on Non-Ionizing Radiation Protection (ICNIRP) has identified a lack of consensus among public health officials regarding whether SWL from artificial sources disrupts circadian rhythm, and if so, whether SWL-disrupted circadian rhythm is associated with adverse health outcomes. Systematic reviews of studies designed to examine the effects of SWL on sleep and human health have shown conflicting results. There are many variables that can affect the outcome of these experimental studies. One of the main problems in earlier studies was the use of photometric quantities as a surrogate for SWL exposure. Additionally, the measurement of ambient light may not be an accurate measure of the amount of light impinging on the intrinsically photosensitive retinal ganglion cells, which are now known to play a major role in the human circadian timing system. Furthermore, epidemiological studies of long-term effects of chronic SWL exposure per se on human health are lacking. ICNIRP recommends that an analysis of data gaps be performed to delineate the types of studies needed, the parameters that should be addressed, and the methodology that should be applied in future studies so that a decision about the need for exposure guidelines can be made. In the meantime, ICNIRP supports some recommendations for how the quality of future studies might be improved.
Recommended Citation
Miller, Sharon; Cajochen, Christian; Green, Adele; Hanifin, John; Huss, Anke; Karipidis, Ken; Loughran, Sarah; Oftedal, Gunnhild; O'Hagan, John; Sliney, David H; Croft, Rodney; van Rongen, Eric; Cridland, Nigel; d'Inzeo, Guglielmo; Hirata, Akimasa; Marino, Carmela; Röösli, Martin; and Watanabe, Soichi, "ICNIRP Statement on Short Wavelength Light Exposure from Indoor Artificial Sources and Human Health" (2024). Department of Neuroscience Faculty Papers. Paper 87.
https://jdc.jefferson.edu/department_neuroscience/87
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Language
English
Comments
This article is the author's final published version in Health Physics, Volume 126, Issue 4, April 2024, Pages 241 - 248.
The published version is available at https://doi.org/10.1097/HP.0000000000001790. Copyright © 2024 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the Health Physics Society